[R] filename

[Uwe Ligges]

Lars wrote:

> Hey,
> 
> I'm generating a .jpeg file for a web application passing parameters to 
> R via cgi. R gets the parameters by using commandArgs, which are passed 
> to a variable named j  and z
> 
> j<-commandArgs()[3]
> z<-commandArgs()[4]
> 
> Later I want to use the characters strings of the argument which the 
> variables are holding for my filename, e.g.:
> 
> jpeg(file="d:/data/images/jz.jpeg",...)

If j contains the name for the file,
jpeg(file=j, ...)
should work. I guess you do not have jpeg support if calling your script 
in non-interactive mode, because you need X11 active. See ?jpeg.

Uwe Ligges



> i tried to use paste and as.character, but neither worked out the way i 
> want it to.
> 
> thanks for any advice, Lars Claussen
> 
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