# Re: [R] Error in cor.default(x1, x2) : missing observations in cov/cor

From: Daniel Malter <daniel_at_umd.edu>
Date: Wed, 27 Feb 2008 19:49:10 -0500

Sorry, I overlooked the

• integer(0) result to which(is.na(x1))==which(is.na(x2)). So that's not it.

Cheers.

cuncta stricte discussurus

-----Ursprüngliche Nachricht-----

Von: Daniel Malter [mailto:daniel_at_umd.edu] Gesendet: Wednesday, February 27, 2008 7:41 PM An: 'Ken Spriggs'; 'r-help_at_r-project.org' Betreff: AW: [R] Error in cor.default(x1, x2) : missing observations in cov/cor

a=c(1,2,3,4,NA,6)
b=c(2,4,3,5,NA,7)

which(is.na(a))==which(is.na(b))

cor(a,b) ####Error
cor(a,b,use="all.obs") ####Error

cor(a,b,use="complete.obs") #### Does it. AND  cor(a,b,use="pairwise.complete.obs") #### Does it too.

cuncta stricte discussurus

-----Ursprüngliche Nachricht-----

Von: r-help-bounces_at_r-project.org [mailto:r-help-bounces_at_r-project.org] Im Auftrag von Ken Spriggs
Gesendet: Wednesday, February 27, 2008 4:34 PM An: r-help_at_r-project.org
Betreff: [R] Error in cor.default(x1, x2) : missing observations in cov/cor

Hello,

I'm trying to do cor(x1,x2) and I get the following error: Error in cor.default(x1, x2) : missing observations in cov/cor

A few things:

1.  I've used cor() many times and have never encountered this error.
2.  length(x1) = length(x2)
3.  is.numeric(x1) = is.numeric(x2) = TRUE
4.  which(is.na(x1))  = which(is.na(x2)) = integer(0)   {the same goes for
is.nan()}
5. I also try cor(x1,x2, use = "all.obs") and get the same error.

What can be going wrong?

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