From: Kunzler, Andreas <a.kunzler_at_bzaek.de>

Date: Thu, 24 Jul 2008 14:09:06 +0200

R-help_at_r-project.org mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu 24 Jul 2008 - 12:27:00 GMT

Date: Thu, 24 Jul 2008 14:09:06 +0200

Dear List,

I ran into some trouble handling missing values.

Assume 2 vectors (numeric) including NAs

a <- c(rep(seq(1,4),4),NA,NA)

b <- c(sample(1:2,14,replace=T),NA,NA,1,2)

a[b==1][a[b==1]<2 | a[b==1]>3] <- NA

The following error accurse:

NAs are not allowed in subscripted assignments

So I tried to exclude NAs

pat<-c((a[b==1]<2 & is.na(a[b==1])==F)| (a[b==1]>3 & is.na(a[b==1])==F)) this is a logical vector

a[b==1][pat==T] <-NA

But it did not help

Even if I have a look at

a[b==1][pat==T]

[1] 1 4 4 1

All I want to do is change those values to NA. Is it possible that my mistake is caused by not understanding

vector[logic operation a][logic operation b]

I thought it is pretty much the same as

x <- vector[logic operation a]

x[logic operation b]

I hope someone can help me

Thanks

R-help_at_r-project.org mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu 24 Jul 2008 - 12:27:00 GMT

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