gnuplot development

Gary Parker wrote:
> I am attempting to write a perl script to allow users to plot functions using
> gnuplot through a web page.  It seems to work fine unless the function has any
> additions in it. For example, "x+1" plots as just "x" and "x**2+x" won't plot at
> all, in fact nothing with "+x" will plot.  

Whatever the problem is, it's quite clearly in your Perl script.  You'll 
have to debug it outside the web server context, or at least export the 
actual commands it will send to gnuplot, in the problematic cases, 
before we can even begin to look at this from the gnuplot perspective.

Hans-Bernhard Broeker <broeker <at> physik.rwth-aachen.de> writes:
> Whatever the problem is, it's quite clearly in your Perl script.  You'll 
> have to debug it outside the web server context, or at least export the 
> actual commands it will send to gnuplot, in the problematic cases, 
> before we can even begin to look at this from the gnuplot perspective.

You're right. The problem is with perl, not gnuplot.  I tested a much simpler
version of the script that didn't involve a web form; it works fine. I'll direct
my question to a perl list.

Thanks for the reply.

BTW, I did find a way around the problem by writing the gnuplot commands to a
file and then having gnuplot retrieve the commands from the file in batch mode.

-- 
G Parker

"I hated life and was constantly on the verge of suicide, from which, however, I
was restrained by the desire to know more mathematics."
Bertrand Russell, The Conquest of Happiness (1930)