gnuplot-py-users

[Gnuplot-py-users] pass an array of instances to Gnuplot.plot

[James S. M. <jam...@di...>]

First off thanks for gnuplot-py, it's helped me concentrate on my code 
w/out worrrying about Gnuplots messy syntax.

I am trying to figure out how to plot multiple sets of file data on the 
same graph without using a replot.

I notice that if I do this it doesn't work because the _add_to_queue 
thinks it is a data array and not an array of instances.  I am trying to 
plot multiple columns from the same or different files on the same graph 
and I can't think of how to do it without using replot.  Is there a 
better way?



p1=Gnuplot.File("file1",title="line1",using=9)
p2=Gnuplot.File("file1",title="line2",using=10)

lines.append(p1)
lines.append(p2)


g.plot(lines)



Thanks,

James

Re: [Gnuplot-py-users] pass an array of instances to Gnuplot.plot

[Michael H. <hag...@jp...>]

James S. Martin writes:
> I am trying to figure out how to plot multiple sets of file data on
> the same graph without using a replot.
[...]
> p1=Gnuplot.File("file1",title="line1",using=9)
> p2=Gnuplot.File("file1",title="line2",using=10)
> 
> lines.append(p1)
> lines.append(p2)
> 
> 
> g.plot(lines)

Yes.  Since Gnuplot.plot() is defined to take a variable number of
parameters, you need to arrange that each of your PlotItems is a
separate parameter to the plot() method.  Do either

    g.plot(p1, p2)

or

    lines = [p1,p2]
    apply(g.plot, lines)

or (if you are using Python 2.0 or later)

    lines = [p1,p2]
    g.plot(*lines)

Michael

--
Michael Haggerty
hag...@jp...