[R] 0/0, R segfaults

Dirk Eddelbuettel edd at debian.org
Fri Aug 19 03:36:56 CEST 2005


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 at basebud:~> R

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

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> 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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