[Rd] Bug in cor() with named array and matrix (PR#7116)

maechler at stat.math.ethz.ch maechler at stat.math.ethz.ch
Tue Jul 20 15:51:21 CEST 2004

>>>>> "jusung" == jusung  <jusung at andrew.cmu.edu>
>>>>>     on Mon, 19 Jul 2004 23:13:01 +0200 (CEST) writes:

    jusung> Full_Name: Ju-Sung Lee
    jusung> Version: 1.9.1
    jusung> OS: Windows XP
    jusung> Submission from: (NULL) (

    jusung> The following commands causes R to crash:
    jusung> a = array(1:3)
    jusung> dimnames(a)[[1]] = c('1','2','3')
    jusung> cor(a,matrix(1:3))

    jusung> not naming the array seems to work.

yes, indeed.  
Thank you for the good bug report.

A shorter version is
   cor(as.array(c(a=1, b=2)), cbind(1:2))

The internals assume to have either a matrix or a vector when
the other argument is a matrix.

I'm still thinking about where to fix the bug, in C or in R.
What I find is that R also excepts list()s as arguments to
cor(), cov(), etc. which I think should rather give an error, 

Martin Maechler

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