![]() I'm working on a better layout to show the two packages side by side.īut for now I'm just putting the dplyr code in a comment above each python call. We'll work through the introductory dplyr vignette to analyze some flight data. Whether you're an R user looking to switch to pandas (or the other way around), I hope this guide will help ease the transition. Remember to (install and) load the tidyverse package first.The comparison is just on syntax (verbage), not performance. The R code below contains an example to capitalize the first letter of each column name. This package provides many tools to process strings, e.g., the str_replace_all() function to remove blanks in column names. The str_to_title() function is part of the stringr package. By providing the str_to_title() function as its argument, the rename_with() function converts the first letter of each column name to uppercase. The rename_with() function changes column names. However, it is recommended to use the tidyverse package instead (which both contains stringr and dplyr). These functions are part of the stringr package and the dplyr package, respectively. In R, the easiest way to capitalize the first letter of a column name is by using the str_to_title() function and the rename_with() function. However, how do you capitalize only the first letter of a column name? So far, we demonstrated how to convert column names to lower-/uppercase. How to Capitalize the First Letter of a Column Name? funs = toupper)Īs the example shows, the rename_at() function allows both column positions or column names to define for which columns to change their case. Remember, before you can use the rename_all() or rename_at() function, you need to (install and) load the dplyr package. Alternatively, the rename_at() function (de)capitalizes only explicitly specified columns based on either their name or position.īelow, we provide 4 examples of how to change the case of column names with dplyr. You convert the case of all column names with dplyr by using the functions rename_all() and tolower() (for lowercase) or toupper() (for uppercase). But, how do you convert column names to lower- or uppercase with dplyr? The tools this package provides are extremely powerful and easy to understand. ![]() Many R programmers use the dplyr (or tidyverse) package for data preparation. How to Change the Case of Column Names with dplyr? Alternatively, the vector might also contain the names of the vector. The code above uses a vector to define the columns to be transformed based on their positions (i.e., 1 and 3). In this code, we capitalize only the first column and the third column name. Next, the names() function and the toupper() function convert the column names to uppercase. The vector defines which columns to capitalize, whereas the square brackets filter those columns. Rather than changing the case of all column names, R can also capitalize some variable names.īesides the functions names() and toupper(), you need a vector and the square brackets to convert some column names to uppercase. Moreover, this function is more versatile than the toupper() function as it can also be used to transform column names to lowercase. Instead of using the toupper() function, the casefold() function converts characters to uppercase, too. You can specify the column names either by their names or their positions.įor example, below we convert only the names of the second column and third column to lowercase. The vector and brackets are used to specify and select the column names, respectively. The easiest way to change the case of some specific column names in an R data frame is by using a vector and the square bracket notation. However, it is also possible to transform the case of just some columns. Convert Some Column Names to LowercaseĪbove, we converted all column names to lowercase. In this article, we discuss the casefold() function in more detail. An advantage of this function is versatility, it can transform letters to both lower- and uppercase. Instead of using the tolower() function, it is also possible to convert the case of column names to lowercase with the little-known casefold() function.
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