Dear all
I have a function in which I would like to change some values to NA according to
some condition.
dropout<-function(y, nahr=FALSE,...) {
<some stuff for computing an index>
if (nahr) y[index]<<-NA
invisible(index)
}
in case y is a vector all works OK but if it is a part of data frame by calling
dropout(df$y) or dropout(df[,number]) no change is done.
Please can you help me what is wrong with my code?
By the way
idx<-dropout(df$y)
df$y[idx]<-NA
works OK
Thanks a lot beforehand
Best regards.
Petr Pikal
Precheza a.s., Nabř.Dr.E.BeneÜe 24, 750 62 Přerov
tel: +420581 252 257 ; 724 008 364
[EMAIL PROTECTED]; [EMAIL PROTECTED]
fax +420581 252 561
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