Re: [R] 0/0, R segfaults

From: Dirk Eddelbuettel <edd_at_debian.org>
Date: Fri 19 Aug 2005 - 11:36:56 EST

On 18 August 2005 at 16:01, Xing Qiu wrote:
| Hi,
|
| I noticed that when I was conducting some calculation involving
| finding correlation coeficients, R stopped abnormally. So I did some
| research, and find out that 0/0 was the culprit. For sure 0/0 is not
| a valid expression, but R should give a warning, an error msg or NaN
| instead of segmentation fault.
|
| I am using R 2.1.0 under Gentoo Linux. My GCC version is 3.3.5.

edd@basebud:~> R

R : Copyright 2005, The R Foundation for Statistical Computing Version 2.1.1 (2005-06-20), ISBN 3-900051-07-0

R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for a HTML browser interface to help. Type 'q()' to quit R.

> 0/0
[1] NaN
>

No problem on Debian 'testing' with R 2.1.1. You may want to try a different libc.

Dirk

-- 
Statistics: The (futile) attempt to offer certainty about uncertainty.
         -- Roger Koenker, 'Dictionary of Received Ideas of Statistics'

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Received on Fri Aug 19 11:43:20 2005

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