From: Nuralanur@...
Date: 2005-06-13T04:41:46+09:00
Subject: Re: Ruby-Gnuplot problem (using Cygwin)

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Hello,
 
I'm still confused about Ruby and Gnuplot.
Without using rgnuplot, just by invoking gnuplot,
 
#!/usr/local/bin/ruby
gp=IO.popen("gnuplot","w");
gp.puts 'plot  x**2';
sleep 1;
gp.puts 'plot [-2:2] x**3';
sleep  1;
gp.close;

I still get that warning about how insecure the world is,
but I see a plot and the program executes.
 
Does anybody have  an installation of rgnuplot - does the  following
code produce a plot correctly with you:
 
require "gplot/Gnuplot.rb"
 
plot=Gnuplot::Plot.new
plot.terminal 'postscript eps'
plot.output  'demo1.eps'
 
x=(1..100).to_a
y=x.collect{|i| i*i}
ds=y.gpds
 
plot.draw ds
 
(That's example No.1 from the manual coming with the rgnuplot.)
I'd very much like to be able to use Ruby's interface for  gnuplot.
Thanks very much in advance.
 
Best regards,
 
Axel 

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