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

[Michael H. <mh...@ka...>]

Simon Clift wrote:

>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?
>>    
>>
>I had this problem today and my solution was to use eval():
>  
>
[...]

It is rarely necessary to resort to eval().  In this case, just set up 
the gpd array the way you did and then use eval().  Here I have modified 
your code as described:

>        # plot contents of dKGrid[][] against xKGrid[]
>
>        pobj = Gnuplot.Gnuplot()
>
>        # Snipped out formatting stuff...
>
>        gpd = []            # Array of plot objects.
>
>        for i in xrange( 0, len( yKGrid ) ):
>
>            # Make a list of plot objects
>
>            gpd.append( Gnuplot.Data( xKGrid, dKGrid[i] ) )
>
>        apply(pobj.plot, gpd)    # Execute the plot command
>        pobj.reset()
>  
>

With newer version of Python (starting with 2.0?) you can use the new syntax

    pobj.plot(*gpd)

Michael

-- 
Michael Haggerty
mh...@al...