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
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