[R] missing value where TRUE/FALSE needed

From: David Croll <david.croll_at_gmx.ch>
Date: Sat, 08 Nov 2008 01:22:13 +0100

Hello dear R people,

for my MSc thesis I need to program some functions, and some of them simply do not work. In the following example, I made sure both vectors have the same length (10), but R gives me the following error:

Error in if (vector1[i] == vector2[j]) { :   missing value where TRUE/FALSE needed

I googled for possible solutions, but I did not find a good explanation for this...

The code:

test <- function() {    

    vector1 <- sample(1:100,10)
    vector2 <- sample(1:100,10)    

    for (i in vector1) {

        for (j in vector2) {
            if (vector1[i] == vector2[j]) {


Regards, David

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 Sat 08 Nov 2008 - 00:24:25 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Sat 08 Nov 2008 - 04:30:23 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive