[Gnuplot-py-users] Re: Plotting a variable list?

[Simon C. <ss...@ma...>]

Hi Nate,

>From Nate Gelbard <gelbardn@tr...> 2003-11-06 22:53:
> I have a database query that returns a variable length list of hosts
for
> which I want to plot some data about.
> How can I pass Gnuplot.plot a list of Gnuplot.Data types?

Sorry I can't reply to the exact thread, I just joined the list.

I had this problem today and my solution was to use eval():

        # plot contents of dKGrid[][] against xKGrid[]

        pobj = Gnuplot.Gnuplot()

        # Snipped out formatting stuff...

        gpd = []            # Array of plot objects.
        gpdStr = ""         # String listing them as arguments

        for i in xrange( 0, len( yKGrid ) ):

            # Make a list of plot objects

            gpd.append( Gnuplot.Data( xKGrid, dKGrid[i] ) )

            if i > 0: gpdStr += ", "            # Comma separate them ...
            gpdStr += 'gpd[%d]' % (i)           # as a list of arguments

        eval( 'pobj.plot( ' + gpdStr + ')' )    # Execute the plot command
        pobj.reset()

Bit late, but I hope this helps...

-- Simon

-- 
Simon Clift                  E-mail: ssclift at math dot uwaterloo dot ca
Ph.D. Student
Scientific Computation Group
University of Waterloo
Waterloo, Ontario, Canada
N2L 3G1