From maechler at stat.math.ethz.ch  Mon Jul 20 10:32:14 2009
From: maechler at stat.math.ethz.ch (Martin Maechler)
Date: Mon, 20 Jul 2009 10:32:14 +0200
Subject: [Rd] slight inconsistency in <Factorize>( <logical matrix> )
Message-ID: <19044.11150.920656.512693@lynne.math.ethz.ch>

We have a very slight inconsistency in the treatment of logical
matrices with our three major factorizations:

qr() coerces to numeric , whereas
svd() and eigen() give an error.

I'm proposing to change  svd() and eigen() such that they also
treat a logical matrix as if it was 0-1 ,  analogously to all
other arithmetic operations.

Martin Maechler, R Core Team & ETH Zurich



[Rd] slight inconsistency in <Factorize>( <logical matrix> )
Martin Maechler