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

[Daniel Malter]

Does the code below solve your problem? If you have NAs in the same rows,
you have to use "c" or "p" as use= parameters. Otherwise you get the error
you described.

 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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