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Using this approach, you can rename as many columns at once as you’d like by name. # "miles_g" "cylinder" "disp" "hp" "drat" "wt"
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By using this you can rename a column by index. Setnames(mtcars, old=c("mpg","cyl"), new=c("miles_g", "cylinder")) colnames() is the method available in R base which is used to rename columns/variables present in the data frame. How to rename Columns in R To rename single column: - Syntax DF > Rename (New name Old Name) - Example: DF > Rename (Column1 ColumnOne). Dplyr package in R is provided with rename() function which renames the column name or. If(!require(dplyr)) #rename "mpg" and "cyl" column names in mtcars Rename the column name in R can be accomplished by using Dplyr. )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. To rename the first 4 columns, we can use the following syntax: #rename first 4 columns To change a single column name, we may use index. I like the next style for rename dataframe column names one by one. # "mpg" "cyl" "disp" "hp" "drat" "wt" "qsec" "vs" "am" "gear" To rename columns of an R Data Frame, assign colnames(dataframe) with the required vector of column names. I think the best way of renaming columns is by using the dplyr package like this. and to add to what Eric and Duncan have said, what you have as column names depends on how the data were imported. There are a total of 11 column names in mtcars: #view column names of mtcars Renaming the First n Columns Using Base R Change column names in R 3 simple examples Rename one column Modify all colnames of data frame Replace several variable names Colnames Function. Median :26.00 Mode :character Median :35.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. :17.00 Length:49ġst Qu.:13.00 Class :character 1st Qu.:26.00 Class :character To rename a column (while keeping its data the same), there is no need to copy the data to a column with a new name.
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When I run the function summary (), that is not what I get, as you can see below.ĭat <- my_data(sex=sample(c("Frau", "Mann"), 10, replace=TRUE)) The fictitious data below should be binary, meaning almost all answers should be coded 0=no and 1=yes, or 0=female and 1=male. Introduction to SQLite ALTER TABLE RENAME COLUMN statement First, specify the name of the table after the ALTER TABLE keywords. Sorry for bothering with something so obvious, but here is my problem still. Let’s have a look how the data looks like: For further illustration, I’m going to show you in the following tutorial how to rename a column in R, based on 3 reproducible examples.įor the following examples, I’m going to use the iris data set. However, depending on your specific data situation, a different R syntax might be needed.ĭo you need to change only one column name in R? Would you like to rename all columns of your data frame? Or do you want to replace some variable names of your data, but keep the other columns like they are?Ībove, you can find the basic R code for these three data situations. rename() changes the names of individual variables using newname oldname syntax renamewith() renames columns using a function. Colnames (data ) <- "New_Name" # Change colnames of all columnsĬolnames (data ) <- c ( "New_Name1", "New_Name2", "New_Name3" ) # Change colnames of some columnsĬolnames (data ) <- c ( "New_Name1", "New_Name2" )Ĭolnames(data) <- "New_Name"Ĭolnames(data) <- c("New_Name1", "New_Name2", "New_Name3")Ĭolnames(data) <- c("New_Name1", "New_Name2")Īs R user you will agree: To rename column names is one of the most often applied data manipulations in R. I am using the RJDBC package to connect to a MySQL (Maria DB) database in R on a Windows 7 machine and I am trying a statement like select a as b from table.