'Extract data frame column after pipe, in base R [duplicate]
I'd like to use the [[ base R function to extract a column from a dataframe at the end of a sequence of piped operations. But I get an error message that doesn't make sense to me. Here's a simple example of the error message:
> mtcars |> `[[`("mpg")
Error: function '[[' not supported in RHS call of a pipe
This example is meant to accomplish the same result as the following:
mtcars[['mpg']]
Why doesn't the simple example mtcars |> `[[`("mpg") work? What can I do instead, using just base R?
Sources
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