Re: R-alpha: missing() bug

Douglas Bates (bates@stat.wisc.edu)
Wed, 11 Sep 96 14:56 CDT


Message-Id: <m0v0vOf-0000TrC@franz.stat.wisc.edu>
Date: Wed, 11 Sep 96 14:56 CDT
From: Douglas Bates <bates@stat.wisc.edu>
To: r-testers@stat.math.ethz.ch
Subject: Re: R-alpha: missing() bug
In-Reply-To: <Pine.SUN.3.91.960911094504.6308A-100000@chekov>
	<Pine.SUN.3.91.960911094504.6308A-100000@chekov>

Could someone summarize the issue for us, please?

My recollection of the way things work in S is that missingness is not
propagated except in NeXTMethod.  The usual defensive programming
style in S is to trap missing arguments at the highest level.
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