Re: R-alpha: R 0.12 alpha: problem with qt()

Kurt Hornik (
Wed, 6 Nov 1996 15:55:47 +0100

Date: Wed, 6 Nov 1996 15:55:47 +0100
Message-Id: <>
From: Kurt Hornik <>
To: Douglas Bates <>
Subject: Re: R-alpha: R 0.12 alpha: problem with qt()
In-Reply-To: <>

>>>>> On Wed, 6 Nov 96 08:07 CST,
>>>>> Douglas Bates <> said:

>>>>> "Martyn" == Martyn Plummer <> writes:
Martyn> At 09:18 06/11/96, <> wrote:
>>> I recently noticed the following problem (R version is 0.12
>>> alpha, system is Debian GNU/Linux 1.1.x): for some combinations
>>> of x and df, qt(x, df) never returns.

Martyn> I have the same set up.  I have tried your examples and have
Martyn> no problems.

> I am also running the same setup and do not have problems with qt and
> these arguments.
>> qt(0.99, 10)
>  [1] 2.763769
>> qt(0.99, 90)
>  [1] 2.368497
>> qt(0.99, 100)
>  [1] 2.364217

Thanks to everyone who replied so quickly.

The problem seems to appear whenever an optimization flag (e.g., -O) is
added to CFLAGS in src/Systems/Linux-elf.  I don't understand why, but
that's what the experiments seem to indicate.  Perhaps I can debug the
problem using -g -O.

Concerning Debian, we actually have a `package', but it goes into
/usr/local rather than /usr to accomodate our local needs.  Plus, it
does not conform to the Debian packaging guidelines in so far that there
is no debian.rules etc to rebuild the package ... If that is no problem,
then I can make the package available anytime.

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