Deleting multiple columns in R

Question

I have a dataframe df with column names from m1 to m100

I want to delete columns in the range m50 to m100. Is there a faster way to do it than hardcoding it

Answer 1

With dplyr you could do it like this:

library(dplyr)
df <- select(df, -(M50:M100))

This removes all columns between column "M50" and column "M100".

A different option, that does not depend on the order of columns is to use

df <- select(df, -num_range("M", 50:100))