From Martin Maechler <maechler@stat.math.ethz.ch>  Thu Sep 27 17:43:58 2001
From: Martin Maechler <maechler@stat.math.ethz.ch> (Martin Maechler)
Date: Thu, 27 Sep 2001 18:43:58 +0200
Subject: [Rd] Problem with merge() (PR#1102)
In-Reply-To: <200109271621.SAA18562@pubhealth.ku.dk>
References: <200109271621.SAA18562@pubhealth.ku.dk>
Message-ID: <15283.22350.315590.177836@gargle.gargle.HOWL>

>>>>> "Don" == Don MacQueen <macq@llnl.gov> writes:

    Don> I have encountered a problem with merge() that appears to be a bug.
    Don> Here's an example to illustrate it.

    >> tmp1 <- data.frame(a=letters[1:3],b=LETTERS[2:4],x=1:3)
    >> tmpa <- expand.grid(a=letters[1:4],b=LETTERS[1:4])
    >> tmpm.1 <- merge(tmpa,tmp1)
    >> tmpm.2 <- merge(tmp1,tmpa)
    Don> Error in "names<-.default"(*tmp*, value = vnames) :
    Don> names attribute must be the same length as the vector


    Don> I'm using R 1.3.0, and it occurs on both the Macintosh and Solaris versions.
    >> version

Bug confirmed, also for the current version of R (1.3.1) and the 
development one.

I'll have a look.

Martin
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[Rd] Problem with merge() (PR#1102)
Martin Maechler