![r rename column r rename column](https://i.stack.imgur.com/nXOlq.png)
Often the base R way of using colnames() to change the names might work if you the column names are in the same order as the new name vector. Here is a quick post for this more general version of renaming column names for future self. Just came across, a really neat trick from Shannon Pileggi on twitter to replace multiple column names using deframe() function and !!! splice operator. And every time I have to google it up :). To change multiple columns by name and by index use rename() function of the dplyr package and use setnames() from late, I am renaming column names of a dataframe a lot, in different flavors, in R using tidyverse.
#R rename column how to#
In this article, you have learned how to rename multiple columns at a time in an R Data Frame (ame). 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 colnames() is used to set the names to a data frame. 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). 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.
![r rename column r rename column](https://www.tutorialgateway.org/wp-content/uploads/Create-Calculated-Columns-in-Power-BI-1.png)
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.
![r rename column r rename column](https://3.bp.blogspot.com/-UQAjDU31a-k/WgSrhvUaweI/AAAAAAAAInE/w6bhh4orNrE-IS_O8zsWal4gtuzpMO4XgCLcBGAs/s640/Screen%2BShot%2B2017-11-09%2Bat%2B11.24.29%2BAM.png)
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. 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.