Dear r-users,
Basically, I have a data as follows,
> data
S s1 s2 s3 s4 s5 prob obs num.strata
1 NNNNN N N N N N 0.0000108 32 <NA>
2 NNNNY N N N N Y 0.0005292 16 <NA>
3 NNNYN N N N Y N 0.0005292 24 <NA>
4 NNNYY N N N Y Y 0.0259308 8 1
....
I want to replace <NA> by 0, when I tried the following command, I get som
error message.
data[is.na(data)]<-0
Warning message:
In `[<-.factor`(`*tmp*`, thisvar, value = 0) :
invalid factor level, NAs generated
Anyone knows how to deal with this?
Thanks,
Kate
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