[Rd] qbeta function (FYI, compiler bug)
apjaworski@mmm.com
apjaworski@mmm.com
Mon, 7 Jan 2002 12:47:12 -0600
I am not sure if this is still true.
Hre is a quick check:
(1) R-1.4.0 (Prof. Ripley build), Win2000
> qbeta(0.025,4,0.5)
[1] 0.5137795
(2) R-1.4.0 (compiled from source), RH-7.2 (gcc 2.96-98)
> qbeta(0.025,4,0.5)
[1] 0.5137795
Andy
__________________________________
Andy Jaworski
Engineering Systems Technology Center
3M Center, 518-1-01
St. Paul, MN 55144-1000
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Morten Welinder
<terra@diku.dk> To: r-devel@hypatia.math.ethz.ch
cc: (bcc: Andrzej P. Jaworski/US-Corporate/3M/US)
01/07/2002 Subject: [Rd] qbeta function (FYI, compiler bug)
09:19 AM
Hi there,
this is just to let you know that the qbeta function, which was
copied from R into Gnumeric, has been confirmed to be miscompiled
by gcc 2.96 on Linux. (That's Red Hat's compiler.)
This shows by qbeta(0.025,4,0.5) ending up taking the wrong
branch of "if (alpha <= 0.5)".
We compile things in a different context, so this may or may not
affect you. The qbeta function was taken from R 0.64.
Morten
http://www.gnome.org/gnumeric/
http://bugzilla.gnome.org/show_bug.cgi?id=68057
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