logicals in data frames -- as.data.frame() should allow them

[Martin Maechler]

Currently, as.data.frame() , i.e., at least its "matrix" method,
still coerces logicals to factors.  I think this is not desired
and not according to the changes to read.table() for R 1.4.0
which allow logicals.

Does anybody see a reason against a change which would allow
logical matrices to become data.frames with logical variables ? 

Martin Maechler <maechler@stat.math.ethz.ch>	http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO C16	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><
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