[R] R hang-up using lm

[Renaud Lancelot]

Martin Maechler a écrit :
>>>>>>"kjetil" == kjetil  <kjetil at acelerate.com>
>>>>>>    on Tue, 27 Apr 2004 19:19:59 -0400 writes:
> 
> 
>     kjetil> On 27 Apr 2004 at 16:46, Raubertas, Richard wrote:
>     >> Within the last few weeks, someone else reported a similar
>     >> problem when using the results of tapply in a call to rlm().
>     >> Note that the result of tapply is a 1D array, and it appears
>     >> there is a general problem with using such a thing on the
>     >> RHS in formula-based modeling functions:
>     >> 
>     >> set.seed(3)
>     >> yy <- rnorm(20)
>     >> gg <- rep(1:10, 2)
>     >> y <- tapply(yy, gg, median)
>     >> x <- 1:10
>     >> z <- lm(y ~ x)  # OK
>     >> z <- lm(x ~ y)  # crashes R
>     >> 
>     >> (R 1.8.1 on Windows XP Pro)
>     >> 
> 
>     kjetil> What exactly do you mean by "crashes R"
> 
>     kjetil> Doing this in R1.9.0, windows XP pro, there is no indication of 
>     kjetil> problems.
> 
> nor is there with 1.9.0 or R-patched on Linux,
> nor with R 1.8.1 on Linux.
> 
> no warning, no error, no problem at all.
> Is it really the above (reproducible, thank you!) example
> that crashes your R 1.8.1 ?

It does it for me: Windows XP Pro, R 1.9.0 (P IV, 2.4 GHz, 256 Mo RAM). 
It freezes RGui and a few seconds later, a Windows message appears 
saying that Rgui front-end met a problem and must be closed.

Best,

Renaud

-- 
Dr Renaud Lancelot
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