Dplyr column names with spaces. Trim factor labels for multiple variables at the same time.

Dplyr column names with spaces Arguments. For example, I have the following data frame: DF <- data. 77915455 A 2 2 0. 1015620 0. In this methods we will use gsub function, gsub() function in R Language is used to replace all the matches of a pattern from a string. However, this is tougher to do in dplyr than I expected. 181. As of dplyr 0. [x] mutate_if [x] mutate_at [x] summarise_if [x] summarise_at [x] select_if [x] rename [x] summarize_all [x] slice; bug. 5253844 0. Replace spaces in column names with underscores Description. 9430645 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Is there a robust way to use a variable that contains a list of strings that correspond to dataframe column names for passing to the various dplyr operations?. Length" "Sepal. The function i wrote for Can I remove whitespace from all column names with dplyr? 0. See Variable name restrictions in R – G5W. ", colnames (data_new1)) data_new1 # Print updated In ggplot2, how do I refer to a variable name with spaces?. Using group_by in a dataset where values of a variable has different name. The R code below illustrates how to delete blanks in variable names and exchange them with a point (i. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I want to filter my data and remove the column with the name 'Yesterday' in it . But is there a way to subset the data based on the column if we have to use quote for the column name? Actually I need do that for a list of this type of columns . 388k 20 20 gold badges 168 168 silver badges 229 229 bronze badges. If "as. These quoted identifiers are accepted by SQL*Plus, but they may not be valid when I would like to take the log of some columns, and create new columns that are all named log[original column name]. What I am trying to do is to normalize column data by groups subject to a minimum standard deviation. How can I use dplyr::select() to give me a subset including only the columns that contain the string?. Hot Network Questions How can I create an asterisk You can expand it further using regex for a broader pattern search. Follow asked Apr 7, 2022 at 17:14. When I try to use operations on a subset of columns in a dataframe, dplyr does great when I name the columns explicitly and one-by-one in comma-separated lists. See the answer by Christos. Some more specifics. If you were changing the column names to get "nicer" axis labels, you should probably do what with xlab() instead. My goal was to create a vector which contained all the column names I would need, dropping necessary variables. names ( colnames ( I may have found a fix for some of this. 000 136. Remove duplicated rows using dplyr. dat %>% mutate(var = case_when(var == 'Candy' ~ 'Candy', TRUE ~ 'Non-Candy')) The syntax for case_when is condition ~ value to replace. It takes as input a character vector consisting of strings to be used for column names, with a length equivalent to the number of columns in R language. e. The original data frame will not be changed by Value. numeric) selects all numeric columns). cols, all by default). frame function in R. Just as you could select a list of columns with select(my_data, one_of(group_cols)), you can use group_by_at to do the following: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Thanks! The actual use case is a little complicated -- in short, I'm doing a series of merges of one dataset to itself, and I don't want variables from the left hand side of the merge to get confused with variables of the same name from the right hand side of the merge. Names are not allowed to contain blanks. Passing column name into function . The latter can be expressed in shortform Use dynamic name for new column/variable in `dplyr` 224. frame %>% {rename(. 861 138. I can get it to print out the column names or print out a dataframe with the new column names, but neither attempt has actually changed the data frame in the global environment. For example, this works: qplot(x,y,data=a) But this does not: qplot("x","y",data=a) I ask because I often have data matrices with spaces in the name. table. (For more on NSE, see Hadley's book. Replace underscore with white space in column names of datatable. Example data: risk = data. change <- grep("^[A-Z]+$", names(df)) names(df)[names. output expected: Various verbs have issues if column names contain spaces or other non-alphanumeric characters. . Since space is a valid character in the string, therefore, column name assignment made using this method accepts spaces in the names. I would also in our code, var1 and var2 can refer to different columns in mydf, and we need to create newCol by taking the sum of values in the columns whose names are saved in var1 and var2. frame( If you need to rename not all but multiple column at once when you only know the old column names you can use colnames function and %in% operator. It involves quoting character vector vars in probe_colwise_names() and select_colwise_names(), which should resolve the _if and _at Multiple column names of a CSV have whitespace in them. I have a panel with the same measure, several times per year. Hot Network Questions How to delete edges of curve based Rename a column based on the original column's name R Hot Network Questions Why does Cutter use a fireaxe to save a trapped performer in the water tank trick? Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company As you can see i have spaces in the data frame which i cannot remove, since the next tool is expecting spaces in the column names (DON'T ask me why!). 6983149 0. Below snippet shows how to change by name. ) But above, I referenced the columns by their column names. Trim factor labels for multiple variables at the same time. It makes it much messier to have to quote the column names when using mutate() and such. Write a function that takes your old column names as input and returns your new column names as output, and you're done :) I'm a little late to the party on this, but after staring at the programming vignette for a long time, I found the relevant example in the Different input and output variable . 3 dplyr mutate using variable columns & dplyr - mutate: use dynamic variable names. Passing a string to an R function and using it as a column name within the function. a tibble), or a lazy data frame (e. I'd like to remove the whitespace from these column names with a single dplyr command. Stack Overflow. The resulting dataframe should look like: Update dplyr >1. It is not the differences in paste and paste0 which gave difference in results. Is there a I'm trying to dynamically create the name of a column and use it inside of mutate. How to exclude columns from a data. Ask Question Asked 8 years, 10 months ago. Passing (function) user-specified column name to dplyr do() 2. Original answer, dplyr (0. Related. I've been trying to remove the white space that I have in a data frame (using R). , I'd reshape into long data and add an ID column. I have a function that I want to apply on the dataframe columns. Replace any data points with spaces with underscores across any and all columns. table column . read_table() is designed to read the type of textual data where each column is separated by one (or more) columns of space. About ; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, dplyr with name of columns in a function. By using Dplyr package in r. – dplyr just gained across() and it seems like a natural choice, but we need columns names to look up the allowed values. 2(ref) value forces the column to be of class character. Check out the following R syntax: data_new2 <- data # Duplicate data colnames ( data_new2 ) <- make . Source. 000 116. For filter it will be filter_. I have a list of two letter names. Usage fix_col_spaces(df) Arguments. I have a data frame that has a bunch of columns with "name", "upper_name"and"lower_name"` as they represent confidence intervals for a bunch of series, but I don't need them all. It throws an error: It throws an error: The problem is, often some of these datasets will have slight changes to their column names, which creates a world of headaches when trying to link new sets with old. You just need to convert the strings to names with as. My df has forecast months as "p1", "p2" I want to calculate the variance to actual; The input I want to give is only the forecast period code, eg: "p1" to work out the answer; sample df So what I really want is a variable name that concatenates the two columns together. 47. asked Aug 17, 2020 at 22:20. 598 333. Then, create a new tibble with column jaccard_sim that is supposed to calculate the Jaccard similarity. Now i want for example to filter all rows starting with "how" and replace "how" with "no_idea". So I can use ‘starts_with()’ function Can't you just wrap the name in back ticks? I know how to base rename columns. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with It is possible, but it is not advisable. Modified 6 years, 10 months ago. Viewed 1k times Part of R Language Collective 1 . I have just been getting into dplyr. Example: df = data. 107 7 7 bronze badges. You can keep or drop columns from a dataframe using the dplyr::select() function from the {dplyr} package. In addition, you could use stringr and dplyr to remove spaces: tmp <- tibble("a" = "", " b" = "") %>% This example illustrates how to keep spaces in the column names when using the data. Example: df <- dplyr::data_frame(`a b` = 1) myvar <- "a b" Background I have a dataset, df. 206. This function in the easiest form would just return a value of a variable, here metric, as an anonymous function, i. Therefore, I do not want column Q1 (which comprises entirely of NAs) and column Q5 (which comprises entirely of blanks in the form of ""). I tried using rename function from dplyr but I can't make it work in a one-liner. r; dataframe; dplyr; Share. It involves quoting character Not sure what is your purpose of renaming summarized column name with original column names. Remove spacing in dataframe by column in R. The dplyr by option to the various *_join functions only lets me specify one column name, but I need to specify two. Can I remove whitespace from all column names with dplyr? 2. Remove rows with all or some NAs (missing values) in data. Sum across multiple columns with dplyr. Add space between a character in R . 3. Let’s create a Dataframe with 4 columns with 3 rows: Output: In the Example 2 explains how to use the make. You can select a range or combination of columns using operators like the colon (:), the exclamation mark (!), and the c() function. 317 272. I'm trying to build a processing script in R which essentially strips all columns of blank spaces and special characters, as these two things contribute to 90% of the differences in names. They work only if all column names are valid R identifiers. frame("Column Name 1" = c(1, 2, 3), "Column Name 2" = c(4, 5, 6)) fix_col_spaces(my_data) # Returns a data frame with column names where spaces are replaced by underscores. If your columns are already strings, then make them names using rlang::sym() for a single column or rlang::syms() for a vector. Examples of use of dplyr::select Let’s go ! 9. I used to use arrange_ but this is now deprecated. 06717385 B 3 3 Given a tibble or data. I would look to perform an operation in tidyverse/dplyr format so that I can filter out any rows that is from the state of GA & CA. So that later on i can add the row "c" "no_idea" to the original data frame. In dplyr, there is a nice way to select a number of columns. Note: Oracle does not recommend using quoted identifiers for database object names. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have a data. a:f selects all columns from a on the left to f on the right) or type (e. I just need it removed from from the start. This seems like it would be simple to figure out; however, I have not been able to find any solutions that fit my needs. select has a helper function called one_of which takes a variable that is a vector of column names as an input. For loop over a group_by when passing in a variable name . Commented Feb 5, 2019 at 22:33. frame() with str_replace_all() Ask Question Asked 6 years, 10 months ago. I understand this can be done outside of dplyr, however I am wondering if there is a solution that uses dplyr and %>% like above. names function to replace blanks in the names of columns. You need to enclose the column name in double quotes. You can gather by position instead of column name, either by giving the numbers of the column that should become the key, or the numbers of the columns to omit Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have this code that splits the column on the second space, but I don't know how to modify it to split on the first space only. names() to remove spaces and special @Markm0705 think of Dplyr/Rlang as implementing a succinct macro/metaprogramming DSL on top of the base R functionality of as. Now when I try to filter out only "Normal weight" values using the following code, I get NULL answer. This happens inside a temp DF. Modified 8 3 . by replacing spaces with dots. 6840462 0. Ronak Shah. First, let’s create a new data frame with default specifications: data_dot <- data . names. fn) to transform the column names from a set of columns (. frame(bad=1:3, worse=rnorm(3), worst=LETTERS[1:3]) bad worse worst 1 1 -0. Mathica Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Dealing with spaces and "weird" characters in column names with dplyr::rename() (1 answer) Closed 3 years ago . If I add code to manipulate the data frame using dplyr it attempts to find a column using the variable name and not the A more recent solution is to use dplyr's bind_rows function which I assume is but by matching column names # columns without matches in the other data frame are still combined # but with NA in the rows corresponding to the data frame without # the variable # A warning is issued if there is a type mismatch between columns of # the same name and an attempt is How can i bind my two tables, matching by column names? The first table looks like this: result size KUALA LUMPUR OTHERS PENANG SELANGOR DARUL EHSAN TOTAL 1: big 0. “. I need to append the data sets and thought the easiest way to match column names among data sets would be to convert the all-capital Select (and optionally rename) variables in a data frame, using a concise mini-language that makes it easy to refer to variables based on their name (e. I'm unable to figure out how I want to use dplyr "summarize" on a table with 50 columns, and I need to apply different summary functions to these. Pss Pss. I am sub-setting a dataframe by selecting specific columns. # Set new column I wish I could just say something like col. mutate in R dplyr using column indexes as opposed to column names . When you pass those columns, if they are bare, quote them using quo() for one variable or quos() for a vector. 366 0. You can use these to perform column selections with syntax that is similar to the select function. Last 60 columns are not read in- col_classes = c I have the following example, where I pass a simple dataframe to a function that summarizes a column. Searching for values that do not have a white space works just fine, like "Universal". If the pattern is not found the string will be returned as it is. Include column names as function input with dplyr . I've got some long format data that 1) needs to be reshaped to wide and then 2) needs the columns resorted according pattern of their names. A modified data frame with spaces in column names replaced by underscores. Based on this we can use gsub() to change the column name from a1 to a2 for example and then use get() to get the values of this column. Removing Whitespace From a Whole Data Frame in R. You can select columns based on patterns in their names with helper functions like starts_with(), I want R to remove columns that has all values in each of its rows that are either (1) NA or (2) blanks. 643 1 1 gold badge 6 6 silver badges 15 15 I'm trying to programmatically pass column names to a function so that they can be selected in dplyr. Andrew Andrew. Create column names with spaces . According to this thread, I am able to use the following to remove columns that comprise entirely of NAs: In this post we will learn how to rename a column name in a dataframe with another name saved in a variable using dplyr. Try names(s_data). change], "text") df User_ID Atext Btext Ctext Dtext Etext 1 1 0. I want to calculate the difference between two column means, but the column name should be provided by variables So far I found only the function as. Follow edited Aug 18, 2020 at 0:30. where(is. I want to rename with dplyr::rename () to keep everything consistent and readable (for my If you're just looking to remove all spaces, I agree that clean_names from janitor would be a good place to start. Each file includes a column with the same name as the file. dd %>% dplyr::select(a:f) In my problem, the columns of the last part of the data frame may vary, yet they always have as name a number between 1 and 99. table The post above regards data. What I would like is for the column names to look like P1_A rather than A_P1 (i. "Summarize_all" and "summarize_at" both seem to have the disadvantage that it's not possible to apply different functions to different subgroups of variables. From the current dplyr documentation (emphasis by me):. you also need to either use updated data frame to override existing data frame, or assign to new variable. I can do: mtcars %>% filter(cyl == 4) In my work, I need to pass a string variable as my c Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company For dplyr versions [0. Change underscore behind word within Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Example 1: Fix Spaces in Column Names of Data Frame Using gsub() Function. The best I could come up with was a call to imap_dfr , but it is more cumbersome to integrate into an anlysis pipeline, because the results need to be re-combined with the original dataframe. names=FALSE, R will convert column names that are not valid variable names (e. Unfortunately I seem to have to use a few more parenthesis than I would like, but the !! operator seems to fall in a weird order-of-operations order. 000 First, create a tibble with a names_ field (vector of strings). How can I do this by using "$" operator? Thank you! r; Share. I need to read some columns from this file in R. data. If it works for all variable name constructs, then can't it just be pulled in as part of the *_ flavors of the functions and methods within dplyr itself? How to reference column names that start with a number, in data. name" works for some variable name constructs, and not for others, then this solution is not viable. Add space after - in a value. A data frame, data frame extension (e. spec_table() returns the column specifications rather than a data frame. frame(id = c(1,1,1,1,1,2,2,2,2,2), a=c(1:10), b=c(10:19)) sum <- function(df, s){ df <- df %>% group_by(id) %>% summarize(s = sum(a)) return(df) } sum(df = The rename function from dplyr can be used to alter column names of a data frame. Dynamic variables names in dplyr function across multiple columns. – yake84. The problem is similar but technically package-dependent, but the solution is the same. Josh O'Brien. It is working fine for other values Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company change several column names() in data. data%>% filter(X_bmi5cat == 'Normal Weight') I get 0 rows for this filtering. I'm new to R so I This removes all the column names that has the letter 'm'. How can I use the tidyverse suite to get rid of the part before the ::? Also, assume I have many columns with the pattern data::mycol so an ideal solution needs not typing manually each affected column. Any help is much appreciated! r; dplyr; na; Share. python capitalize first letter only. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I want to mutate one column of a data frame dynamically with dplyr by passing column names with a variable. Probably less efficient than the solution using replace, but an advantage is that multiple replacements could be performed in a single command while still Not sure what is your purpose of renaming summarized column name with original column names. I know you can probably do something like this with a for loop but beyond that I get a little lost. The example data is below: #Orignial data set. How can I use 1 and 2, Using column name in `dplyr`'s `mutate` function. The data frame is large (>1gb) and has multiple columns that contains white space in every data entry. frame(A = 1:10, Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The rlang::sym() function takes the strings and turns them into quotes, which are in turn unquoted by !! and used as names in the context of df where they refer to the relevant columns. There's different ways of doing the same thing, as always, and this is the shorthand I tend to use! I have a large number of data sets each containing a long list of column names. Syntax: gsub(” “, “replace”, I can't figure out how to use SE dplyr function with invalid variable names, for example selecting a variable with a space in it. How to programmatically remove space after string? 1. But if you are looking for a solution where you want to have sum of multiple columns and hence wants to rename those then dplyr::mutate_at does it for you. How to Pass column name in group by from a variable. I think it would be easier to select these by excluding those I don't want to change. This looks like two values and you need to decide how to deal with this. I like what they've done, but I really dislike all the new terminology, the constant churn in design, and the overly-complicated descriptions in the EDIT: these days, I'd recommend using dplyr::rename_with, as per @aosmith's answer. Each column has a different minimum standard deviation. 4270281 0. Passing column name to function in R. Have a look at the following R code: data_new1 <-data # Duplicate data colnames (data_new1) <-gsub (" ", ". 415 3: small 435. names=TRUE, then use single back-quotes (`) to surround the names. In dplyr mutate, how do you use a variable to assign a new column name? Hot Network Questions Is there a way to confirm your Alipay works before arriving in China? Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I want to use R to split just column A of the table and I want a new column added to the table D, with values awe, abcd, asdf, and xyz. ))} The problem is that it doesn't let me unpack the vector as arguments I think. contain spaces or special characters or start with numbers) into valid variable names, e. The column names themselves are a bit funny as they contain + and -characters, which I think is causing the issue. So, using regex, you can do the following: I want to know if there is a way to rename column names by position of the column, rather than changing by column name. frame("Column Name 1" How to use $ in R to select a column with space in its colname? Ask Question Asked 8 years, 11 months ago. frame is grouped by a column that has a space in the name. Perhaps, there is a space in 'Normal Weight'. I am trying to figure out how to use the tidyverse to dynamically arrange a dataframe. Hi, it seems that summarise_all (I have not tested other "underscored" functions) doesn't work when data. One column holds the Unless you specify check. 2. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have a Location Column which looks like the following-Location San Jose CA Santa Clara CA I want to split into two columns. See the answer by Akrun. Add space after - in a value when there is no space after it. I've tried: mpg %>% rename("tr ans" = trans, "m Hi there, I giving my first project using data from work, which I would normally use Excel. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Use grep to find the letter name columns, along with paste to concatenate the string text to the end:. Renaming dataframe column names which contain a space. For rename(): <tidy-select> Use new_name = old_name to rename selected Using rlang's injection paradigm. For example, I want to subset data to 4-cyl cars. I do a series of things to them, identifying both the file and the column with the name contained in a variable, sT. Follow edited Jan 6, 2016 at 21:33. Tried using make. change] <- paste0(names(df)[names. 649 0. 1. In some files the column names are all capital letters and in some files only the first letter of the column names is capitalized. 91. krlmlr 6. I'm confused how I would return to column name for each missing data entry. We will use dplyr’s rename() function in combination with special functions that are part of tidyverse’s tidy eval functionalities. I'm using the separate function from tidyr, but giving the sep argument as " " gives me the following-City State San Jose Santa Clara How can I split the column based on only the second space? You have several issues as pointed out by akrun and Henrik: as columns in a data frame can only be of the same class, the 1. frame. frame and keep the spaces between I have a data frame ("data") with lots and lots of columns. Hot . For example Another solution with dplyr using case_when:. seed(100) I have a dataframe where the name of the column which is to be trimmed for whitespaces is comming as a variable and I am not able to resolve the variable to point me to the column so that it can be . The code below works, but how can I pass the vector called columnstolog into muta The code below works, but how can I pass the vector called columnstolog into muta to be able to use the names as variables, the main reason. 0. Passing two sets of column names to function. I know we can always rename the column. symbol, substitute, etc. I may have found a fix for some of this. For example, to select the columns between column a and column f, I can use. I read this this question and practiced matching patterns, but I am still not figuring it. Commented Feb 5, apparently, group_by() or similar functions do not accept column names with space in their names. I want to select column names by passing a vector argument to dplyr's select: df <- data. Note that the columns of that dataframe could change and the column names have spcaes. How do I replace NA values with zeros in an R dataframe? 1085 . name and then insert them into the expression. ), but standard indexing in base R is arguably even simpler for this type of task. Initially, the column names are converted using the make Try putting collapse in paste, same result will be obtained, except, space will be added between values of two columns. Often, this means capturing expressions before they are evaluated, and evaluating them in a different environment (context/scope) to normal. One of the column is called "High Score". Skip to main content. Syntax The rename function alters column names using the syntax new_name = old_name while rename_with takes a function (. 3 - 0. Try understanding usage of paste and paste0 and usage of collapse. from dbplyr or dtplyr). 27,0. ”) using the gsub function in R. 692 4: tiny 0. The issue I have encontered is the column names can contain spaces & special characters. These can be used for passing variables. If you do use check. 207 2: medium 187. For this I tried using read. I'm not that familiar with regex. suppressPackageStartupMessages # Make a character vector of the names of the columns we want to take the # maximum over target_columns = iris %>% select(-Species) %>% names ## [1] "Sepal. Follow asked Oct 20, 2020 at 15:10. 0. Whenever I try and rename the 'TanishaIsCool' column, I get an error: unexpected string constant. Length" "Petal. Would prefer this to be done using dplyr. There is no easy solution for this case, and the work-around of moving some code inside the chunks (as suggested in one of the comments) is probably the way to go. read_table() is like read. g. frame (remove spaces, inject dots)? 5. frame that has duplicate column names, I want to use dplyr::rename or dplyr::rename_with to either: (a) differentiate the duplicate names with a serial numeric suffix ('a_1', Skip to main content . Trim whitespace from data. All 18 comments. Modified 8 years, 10 months ago. 3 every dplyr function using non standard evaluation (NSE, see release post and vignette) has a standard evaluation (SE) twin ending in an underscore. As an example, let's assume the iris dataset would have 50 columns, so we do not want to I'm a bit late to the game, but my personal strategy in cases like this is to write my own tidyverse-compliant function that will do exactly what I want. Width" "Petal. Examples my_data <- data. These versions had standard evaluation (SE) semantics: rather than taking arguments by code, like NSE verbs, they took arguments by value. name in conjunction with the non-standard evaluation version of select, which is select_: In this article, we will replace spaces in column names of a dataframe in R Programming Language. Relative frequencies / proportions with dplyr. df: A data frame. , phase_variable rather than variable_phase). Some of the columns contain a certain string ("search_string"). Viewed 6k times Part of R Language Collective 4 . I have used iris table to made the following example: Here, I am able to load it using dplyr, but as you can see the names of the columns are cumbersome. How to fix spaces in column names of a data. As mentioned in the title, I would like to select a column with name "Avg Estimates" in a dataframe. 0 df %>% rename_with(~metric, value) Explanation: The rename can be performed in a pipe with the rename_with which is more generic and thus more powerful. I tried: Recent versions of the dplyr package include variants of group_by, such as group_by_if and group_by_at. I wish to add spaces within my column name TanishaIsCool Hello How to deal with nonstandard column names (white space, punctuation, starts with numbers) 13 Dealing with spaces and "weird" characters in column names with dplyr::rename() As I'm going through and learning more about the filter function of dplyr, I noticed that I do not get any results when I search for a value within the "distributor" column with a white space in it - like "Walt Disney" in the example below. frame rather than bypassing the checks with colnames(). By tidyverse-compliant, I mean that the first argument of the function is a data frame and that the output is a Use object instead of column name in dplyr's group_by. This function takes a data frame as an argument and replaces all spaces in the column names with underscores. Notice that there is always a ", " (a comma, followed by a space) before the state abbreviation. getting rid of spaces in R column values using dplyr. Value. which can be clunky and verbose. Is there a better way? important: I want to give those names on creation To program with arbitrary column names in dplyr, you need to use the standard-eval versions of the functions, which end in _, so your variables don't get interpreted as column names by the NSE versions. Are you sure you need that? – MrFlick. aname <- "mjr"; f2(aname)). na() may help, though I'm not sure how. table() with options which can be seen in the code below, the code is pasted below-### Defining the columns to be read from the file, the first 5 column, then we do not read next 24, after this we read next 5 columns. names=col_names. Use dynamic name for new column/variable in `dplyr` 250. to use dynamic names in mutate. create table my_table ("MY COLUMN" number); But note the warning in the documentation:. See Methods, below, for more details. dplyr group_by - Mix variable names with and without surrounding quotes. Suggestions: split Col1 into two columns. Don't use quotation marks. 344 245. 000 0. how to pass a column name to a function. I'm using mtcars dataset to illustrate my question. I tried: Programming in the Tidyverse with column names held in variables is certainly easier than it used to be (no longer necessary to wrestle with arcane concepts such as quasiquotation etc. Any suggestions? r; dplyr; Share. Documentation here. In addition, rename_with allows to rename columns using a function. name to provide column names as text, but this somehow doesn't work here With fix column names it works. Below is a simple Thanks, @Hong Ooi. Hot Network Questions Is there a Noether theorem for lower dimensional conservation laws? A mistake in cover letter Is sales Since you don't necessarily know the column names, but know the positions of the columns for which you need standard deviation, etc. Removing white space from data frame in R. One column holds the Replacing "white spaces" in a column with "null" in R. Improve this question. Also, in Col2 there is this entry: 0. However, I can not seem to be able to do the same @Moody_Mudskipper For f2, all four examples work, and so does capturing the column name in a variable (i. 978. 342 348. dplyr used to offer twin versions of each verb suffixed with an underscore. 415664129 2 2 0. which. seed(100) The example data is below: #Orignial data set. If you're trying to programmatically select an argument as a column and you don't want to rename or do something like paste/sprintf the column name into backticks, you can use as. 7) (? - June 2017) (For more recent dplyr versions, please see other answers to this question). I'm looking for something like this: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I am not sure how you are running things - here I provide an answer with respect to knitr. Using dplyr's mutate, create names_vec, a list-column, where each row is now a vector (each element of vector is a letter). , col_names=names(. 000 223. Your first statement is not true. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company In the second column, I have a value "Normal weight" which is having a space in it. [[Also as griffinevo and Kim have mentioned in the comments above, stick with Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company but really it would be better to stick to using valid column names for your data. Method 1: Using gsub() Function. Why do qplot() and ggplot() break when used on variable names with quotes?. I have a dataframe which I would like to query. I have some data listing Postcodes: Postcode easting northing 1 AB1 1AA 394251 806376 2 AB1 1AB 394235 806529 3 AB1 1AF 394181 806429 4 AB1 1AG 394251 806376 5 AB1 1AH 394371 806359 I first_name gender 1 abby either 2 bill either 3 john M 4 madison M 5 zzz <NA> But I want to do this in dplyr because I'm using that package for all my other data manipulation. The name of the summarizing column, s, I would like to have as a parameter to the function: df <- data. Start of original post. Using column name as function argument in R. 298. I need to arrange decending if numeric, I want to change multiple columns (in real data approx 20 columns) to lower case. Commented Sep 23, 2016 at 23:36. 8153531 0. (I omitted loops & map statements for convenience) Let's start with a very efficient 'dplyr' only solution using across(): Inside of across we can use cur_column() to get the name of the current column. Now, I want to You have several issues as pointed out by akrun and Henrik: as columns in a data frame can only be of the same class, the 1. Improve this question . When you provide dplyr::select with column names without quotation marks, dplyr is using non-standard evaluation to interpret them as columns. The column names will vary so I've tried to use the standard evaluation version of the select function select_. Hot Network Questions What is this FreeDOS kernel loader found on the “W3x4NTFS” disk image? What does "standard bell" mean? Happy 2025! This math equation is finally true. 2 Learning objectives. e. function(x) return metric. You want your column names to contain spaces? That's generally a really bad idea for working with the data. 874 9656. frame("A" = letters[1:5], "B" = letters[6:10], "2015" = rep(1, 5), check I am creating a bunch of files. m %>% data. Overview of selection features Tidyverse selections implement a dialect of R where operators make it easy Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company In the above example, we can see that there are blank spaces in column names, so we will replace that blank spaces. It involves quoting character vector vars in probe_colwise_names() and select_colwise_names(), which should resolve the _if and _at One of the convenient functions dplyr provides is called ‘starts_with()’, which would find the columns whose names start with given characters and return those columns. Which will rename and clean all column names to the following: [1] "this_is_column_one" "another_amazing_column_name" "x_this_columns_is_so_special" Everything becomes snake_case rather than CamelCase, but overall clean_names is very flexible in the column names it handles. table(), it allows any number of whitespace characters between columns, and the lines can be of different lengths. Width" # Make a vector of dummy variables that will take the place of the real # column names inside the interpolated formula dummy_vars = R using variable column names in summarise function in dplyr. kfn goivmn sqbo llwgf aii ffcvo ngqw bktglt hsi ivoziuh