creating graphs from lists

[Luis P. Mendes]

I'm developing a program in Python, with no gui, and now I've reached a
point where I would need to plot list of elements on a graph.

How can I do it? preferably in a simple way?


Luis

 

[mutah]

I'm developing a program in Python, with no gui, and now I've reached a
point where I would need to plot list of elements on a graph.

How can I do it? preferably in a simple way?


Luis

Depending on how sexy must look your graph, have a look on gnuplot and
his pythonixc interface gnuplot-py, http://gnuplot-py.sourceforge.net/,
it may fits your requirements

Mutah

 

[John Hunter]

Luis> I'm developing a program in Python, with no gui, and now
Luis> I've reached a point where I would need to plot list of
Luis> elements on a graph.

Luis> How can I do it? preferably in a simple way?


matplotlib has non GUI-outputs. You select these by choosing your
"backend". There are two ways of doing this, from the prompt or in a
configuration file. Let's say you have a script to plot a list

from matplotlib.matlab import *
plot([1,2,3])
savefig('somefile')

If you run this script as

> python myscript.py -pPS # generate postscript somefile.ps
> python myscript.py -pSVG # generate SVG somefile.svg
> python myscript.py -pAGG # generate somefile.png

If you know you always want to generate png for example, you can set
this by default and don't have to supply the command line option.

matplotlib also has a GUI mode, but you don't need it.

homepage : http://matplotlib.sourceforge.net
screenshots : http://matplotlib.sourceforge.net/screenshots.html
tutorial : http://matplotlib.sourceforge.net/tutorial.html

John Hunter

 

[Luis P. Mendes]

Thank you for the replies.

John,

matplotlib is what I need, specially with the pcolor_demo.py module.

Thank you again.

Luis Mendes

 

[Lonnie Princehouse]

Check out graphviz:

http://www.research.att.com/sw/tools/graphviz/

There are Python bindings somewhere, but I seem to recall they're
broken or incomplete. However, it's easy enough to write out a file
in graphviz' format. It does an excellent job of laying out graphs.