Error: Can’t rename columns that don’t exist.
Error: Can’t rename columns that don’t exist., In this article, you’ll discover how to replicate and diagnose the R programming error “Error: Can’t rename columns that don’t exist.”
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Example Data Generation
For this R programming tutorial, we’ll start with the following data.
df <- data.frame(X = 5:1, Y= letters[1:5])
df X Y 1 5 a 2 4 b 3 3 c 4 2 d 5 1 e
Approach 1: Reproduce the Error: Columns that don’t exist can’t be renamed.
We’ll show you how to recreate the “Error: Can’t rename columns that don’t exist.” in R in this example.
First, we need to install and load the plyr package first.
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#install.packages("plyr") library("plyr") #install.packages("dplyr") library("dplyr")
Let’s say we wish to use the rename function to rename the column names in our data frame. Then we may try running the R code below.
df1<- rename(df, c("X" = "col1","Y" = "col2"))
Error: Can't rename columns that don't exist. x Column `col1` doesn't exist.
Unfortunately, the “Error: Can’t rename columns that don’t exist.” message appears in the RStudio console.
The reason for this is that both plyr and dplyr provide a rename function.
Because we loaded the dplyr package last, the R programming language tries to use the dplyr package’s rename function.
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The preceding R code, on the other hand, is designed to use the plyr package’s rename function and hence returns an error notice.
Approach 2: Resolve the Error: Columns that do not exist cannot be renamed.
This example shows how to fix problems with the rename function, such as when R utilizes the wrong package’s rename function.
To ensure that we use the plyr package’s function, we must include the package’s name in front of the function, as seen below.
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df1<- plyr::rename(df, c("X" = "col1", "Y" = "col2"))
df1 col1 col2 1 5 a 2 4 b 3 3 c 4 2 d 5 1 e
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We’ve constructed a new data frame with modified variable names, as displayed. There were no longer any error messages in the RStudio console.