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You can also use this method to rename data frame column by index in R. Actually, colnames() is used to set or get the names of a data frame. You can also have the columns with a list to rename.Ĭolnames() is another method available in R which can also be used to rename all column names (list with column names). In the below example we are assigning a vector of names to data frame column names. Here c() returns a one-dimensional vector with the column names and names() is used to set the names to a data frame. You can also use this method to rename data frame column by index.įollowing is the syntax of the names() to use column names from the list. Names() is the method available in R which can be used to change all column names. The above example changes back the column names from c1 to id, c2 to pages and c3 to name. To load a library use library("data.table"). Once installation completes, load the data.table library in order to use this setnames() method.
#R rename column install#
Like dplyr, data.table is a third-party library hence, in order to use data.table library, you need to first install it by using install.packages('data.table'). Setnames() is a function from data.table library that can be used to change multiple columns at a time in the R dataframe. Note that rename() with %>% doesn’t change the current data frame instead, it returns the new data frame after the rename hence, assign this to a data frame to change it on the existing data frame.Ĥ. Use the same rename() from R dplyr library to change multiple columns by index position in the data frame. This changes the column names id to c1, pages to c2 and name to c3. Once installation completes, load the dplyr library using library("dplyr"). When you use %>% operator, the functions we use after this will be applied to the dataframe to the left of the operator.ĭplyr is a third-party library hence, in order to use dplyr library, you need to first install it by using install.packages('dplyr'). At a time it will change single or multiple column names. The operator – %>% is used to load the renamed column names to the dataframe. Rename() is the method available in the dplyr library which is used to change the multiple columns (column names) by name in the dataframe. Also, if you have data in excel load it by referring to Import Excel File into R.
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If you already have data in CSV you can easily import CSV files to R DataFrame. Let’s create an R DataFrame, run these examples and explore the output. # Example 2 - Rename multiple columns by index # Example 1 - Rename multiple columns by name Quick Examples of Rename Multiple Columnsįollowing are quick examples to rename multiple columns by name and index in the R data frame. Using this approach, you can rename as many columns at once as you’d like by name.1. # "miles_g" "cylinder" "disp" "hp" "drat" "wt" If(!require(dplyr)) #rename "mpg" and "cyl" column names in mtcars
#R rename column how to#
)įor example, here is how to rename the “mpg” and “cyl” column names in the mtcars dataset: #install (if not already installed) and load dplyr package Names(mtcars) % rename(new_name1 = old_name1, new_name2 = old_name2.
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To rename the first 4 columns, we can use the following syntax: #rename first 4 columns There are a total of 11 column names in mtcars: #view column names of mtcars Renaming the First n Columns Using Base R This tutorial explains how to rename data frame columns in R using a variety of different approaches.įor each of these examples, we’ll be working with the built-in dataset mtcars in R.