From maechler at stat.math.ethz.ch  Tue Jul 20 15:51:21 2004
From: maechler at stat.math.ethz.ch (maechler@stat.math.ethz.ch)
Date: Tue Jul 20 15:51:30 2004
Subject: [Rd] Bug in cor() with named array and matrix (PR#7116)
Message-ID: <20040720135121.7F807108B6@slim.kubism.ku.dk>

>>>>> "jusung" == jusung  <jusung@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) (128.2.79.102)


    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, 
IMO.

Martin Maechler


[Rd] Bug in cor() with named array and matrix (PR#7116)
maechler@stat.math.ethz.ch