Is there a quicker way to drop a data frame column than setting it to NULL?
Dimitri Shvorob wrote:
If I want to drop columns x, y, z from dataframe df, is there a better alternative to df$x = NULL df$y = NULL df$z = NULL There are sufficiently many columns remaining to make df = subset(df, select = c(a,b,c,d[etc])) cumbersome.
You can use subset with the select argument specifying
which variables to omit:
df = subset(df, select = !names(df) %in% c('x', 'y', 'z'))
or just
df[!names(df) %in% c('x', 'y', 'z')]
-Peter Ehlers
Thank you.
Peter Ehlers University of Calgary