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define $ right parameter with a variable in R

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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answered Oct 17, 2021 by 深蓝 (71.8m points)

Use [[ instead of $. x$y is short hand for x[["y"]].

my_helper <- function (my_param) {
  levels(diamond[[my_param]])
}
my_helper("cut")

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