Displaying 1 result from an estimated 1 matches for "f830d23a".
2013 Mar 02
3
replace zeros for NA in a column based on values of another column
Hi everyone,
Imagine that I have a data frame with four columns:
data<-
a b c d
0 1 1 0
1 1 1 1
1 0 0 1
I want to replace the zeros in columns a:b for NA only for the rows in
which column d are zero. So
a b c d
NA 1 1 0
1 1 1 1
1 0 0 1
I am trying