Message-ID: <5C9D80739A5FCC4995C426E74D3573C48B6B01@smmail4.rand.org>
Date: 2005-08-16T05:56:24Z
From: Fulton, Brent
Subject: merge warning is.na(out$h)
Hi,
Does anyone know how to interpret this merge warning and whether it's critical to fix? The merge seemed to work fine, but I am concerned.
data3<-merge(data1, data2, by="ID", all=TRUE)
Warning messages: 1: is.na() applied to non-(list or vector) in: is.na(out$h) Error in cat(list(...), file, sep, fill, labels, append) : argument 2 not yet handled by cat
When I remove all=TRUE or just include all.y=TRUE, I don't get the warning; however, I get the warning when I include all.x=TRUE.
Thanks,
Brent Fulton
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