Message-ID: <7F3D806A-A524-466B-93BE-7DB33CDE1B11@auckland.ac.nz>
Date: 2009-01-19T21:37:25Z
From: Rolf Turner
Subject: Compare matrices
In-Reply-To: <D3BF1A75-F900-431A-988B-E0A3C178C478@comcast.net>
On 20/01/2009, at 10:05 AM, David Winsemius (who should know better)
wrote:
<snip>
> B[which(B == FALSE)] <- NA
<snip>
This sort of syntax drives me, and all right-thinking people,
subclinically neurotic
(or as a psychiatrist would say, stark staring bonkers).
Admittedly it's not (quite) as bad as using ``Y==TRUE'' where ``Y''
is what is wanted, but it's pretty bad.
One should say ``B[!B] <- NA''.
cheers,
Rolf Turner
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