[R] Strange warning in summary.lm

[Prof Brian Ripley]

On Thu, 19 Jul 2007, Peter Dalgaard wrote:

> ONKELINX, Thierry wrote:
>> The problem also exists in a clean workspace. But I've found the
>> troublemaker. I had set options(OutDec = ","). Resetting this to
>> options(OutDec = ".") solved the problem.
>>
>> Thanks,
>>
>> Thierry
>>
> Oups. That sounds like there's a bug somewhere. Can you cook up a
> minimal example which shows the behaviour?

Any use of summary.lm will do it (e.g. example(lm)).  The problem is in 
printCoefmat, at

    x0 <- (xm[okP] == 0) != (as.numeric(Cf[okP]) == 0)

and yes, it looks like an infelicity to me.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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