R: Remove multiple empty columns of character variables

Question

I have a data frame where all the variables are of character type. Many of the columns are completely empty, i.e. only the variable headers are there, but no values. Is ther

Answer 1

It depends what you mean by empty: Is it NA or "", or can it even be " "? Something like this might work:

df[,!apply(df, 2, function(x) all(gsub(" ", "", x)=="", na.rm=TRUE))]