[R] Segmentation fault with expression on linux

[Jan Goebel]

Hello,

using SuSE 7.0 PIII500 (192MB RAM) and 

platform i686-pc-linux-gnu
arch     i686             
os       linux-gnu        
system   i686, linux-gnu  
status                    
major    1                
minor    1.1              
year     2000             
month    August           
day      15               
language R                

also on the same machine with
         _                
platform i686-pc-linux-gnu
arch     i686             
os       linux-gnu        
system   i686, linux-gnu  
status                    
major    1                
minor    2.0              
year     2000             
month    12               
day      15               
language R                

your eample runs without any problems.

Greetings

jan

On Mon, 18 Dec 2000, Thomas Petzoldt wrote:

> I have a problem, that the plot of mathematical formula sometimes
> crashes R on Linux (SuSE 6.2 and 7.0 on a Dual PIII/500 machine with 1GB
> RAM). The problem occurs for example in demo("graphics"), i.e. in the
> last part were the mathematical symbols are plotted.
> 
> There are several circumstances to reproduce this segmentation fault,
> but the following is one of the most simple examples. The first two
> text() functions do well, but a combination of the two will crash the
> system. The problem persists from R 0.99, 1.1.1 and (recently) with 1.2,
> but it works fine on Windows (1.1.1).
> 
> #----------------------------------------
> #The example:
> #----------------------------------------
> 
> plot(c(0,1),c(0,1),type="n")
> text(0.5,0.7,expression(y == e^-frac(x,y)))      # o.k.
> readline("press return")
> text(0.5,0.6,expression(y == frac(x,sigma)))     # o.k.
> readline("press return")
> text(0.5,0.5,expression(y == e^-frac(x,sigma)))  #segmentation fault
> #----------------------------------------
> 
> Any idea?
> 
> Thank you very much!
> 
> Thomas Petzoldt
> 
> --
> Dresden University of Technology
> Institute of Hydrobiology
> http://www.tu-dresden.de/fghhihb/
> mailto:petzoldt at rcs.urz.tu-dresden.de
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-- 
+-----------------------------------
 Jan Goebel (mailto:jgoebel at diw.de)

 DIW Berlin 
 Longitudinal Data and Microanalysis
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 D-14195 Berlin -- Germany --
 phone: 49 30 89789-377
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