On Mon, 22 May 2000 kjetikj@astro.uio.no wrote:
> Full_Name: Kjetil Kjernsmo
> Version: 1.0.1
> OS: osf1
> Submission from: (NULL) (129.240.28.227)
>
>
> Ouch, another obscure bug...
> I just had a bus error crash, with a core dump, a small one this time.
> Usual <URL:http://www.astro.uio.no/~kjetikj/tmp/core>.
> I had done a few simulations, and done a chisq.test() on them.
> These simulations also write about 190MB's to file, but
> I have no idea whether that is relevant, and those data are not
> used. The calls I do look like this:
> > ch1 <- chisq.test(t(apply(cbind(rep(5000000, 4)), 1, lineprofile,
1, 100,
> "point")))
> > ch1
>
> Pearson's Chi-square test
>
> data: t(apply(cbind(rep(5e+06, 4)), 1, lineprofile, 1, 100,
"point"))
> X-squared = 463.8359, df = 300, p-value = 3.726e-09
>
> > ch1$observed
>
> Process R bus error (core dumped) at Mon May 22 12:38:49 2000
>
>
> ....so it doesn't crash when I print the whole object, but when I
> a vector of the object, it crashes... And, restarting R, it doesn't
> happen.
>
> I heard the sysadm who did the installation had some problems,
> I don't know what it was about, but if I understood him correctly,
> it only happened when he tuned for EV6, so it shouldn't be a problem
now,
> I guess....
>
> Kjetil
I can't reproduce the problem on my system (R Version: 1.0.0, OS: osf1
V5.0). Compiled with gcc/g77 using optimisation level -O2 (determined by
configure script).
> ch1 <- chisq.test(t(apply(cbind(rep(5000000, 4)), 1, lineprofile, 1,
100,"point")))
> ch1
Pearson's Chi-square test
data: t(apply(cbind(rep(5e+06, 4)), 1, lineprofile, 1, 100, "point"))
X-squared = 404.6772, df = 300, p-value = 5.125e-05
> ch1$observed
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13] [,14]
[1,] 160 144 205 244 273 314 395 454 521 592 713 864 905 1043
[2,] 139 175 210 232 276 369 372 459 525 566 687 781 886 981
... etc ...
Brad
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