First, you define the new name, then an equal sign, and finally the old name. This function is used frequently because of its simplicity. Library(dplyr) Rename columns with dplyrusing the rename() functionįirst, you can use the rename() function. Remember, before you can use (some of) the function mentioned below, you need to install and load the dplyr package. For example, there are at least 3 ways to rename columns with dplyr. ![]() As a result, there are always many ways to solve a problem. Because of its versatility, the dplyr package is one of the most used packages in R. ![]() The dplyr package provides many useful functions and operations for data processing. The third method to rename columns in R is by using the dplyr package. Setnames(my_df, old = old_names, new = new_names) The code snippet below demonstrates how to use the setnames() function. If you don’t know whether the names are written in upper or lower case, you might want to change the case of the columns before renaming them. That means that it treats “A” and “a” differently. It is important to mention that the setnames() function is case-sensitive. ![]() Like the previous method, the column names (both new and old) must be written between (double) quotes and must be separated by commas. A vector with the names of the columns you want to change.To rename columns of a data frame with the setnames() function you need to provide 3 arguments, namely: It is both intuitive, and fast, and can be used in combination with dplyr. The setnames() function is part of the data.table package and is (one of) the most convenient functions to modify column names. The second method to rename columns in R uses the setnames() function. Rename Columns with the setnames() Function Therefore, we define the new column names “ a_new” and “ b_new“, but also the other (unchanged) names. Moreover, if you don’t specify all column names, R assigns a default value to those columns that you didn’t specify.įor instance, in the code below we want to change only the first 2 (out of 5) column names. Even those that you don’t want to change. Irrespectively of the number of columns you want to rename, you must always specify all column names (i.e., the second requirement). ![]()
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