Re: [Gnuplot-py-users] Re: Contributions to Gnuplot.py

[Leonardo M. <lm...@ud...>]

Hi Michael, Hola Fernando, All :-)

I have done some tricks very similar to Fernando's
independently, there is perhaps some real need for
a set of simplified methods in gnuplot, to make its
use a little friendlier. But I am not sure what is the
best way to go. Add some methods ? Create a higher
level interface to gnuplot ?. Don't know.

I'll post my solutions briefly:

[1] I inherit my own myGnuplot(Gnuplot) to extend Gnuplot as I need
[2] I wrote an external functions to do quick plots

In the first case I handle the terminal setting to postscrip, x,
etc. I use reasonable (for my use) default values. So a ps plot goes
like this:

    g.set_ps('filename.ps')
    g.plot(whatever)
    g.set_x()

In the second case I am able to do quick plots from an interactive
shell, just call qplot(y), or qplot(x,y), or plot(x,y1,y2) ... etc

So, in short, I agree there is a need for the functionality
Fernando is suggesting, the question is HOW to implement it.

Thank you all for your time. Cheers,
-- Leo

PS: So, here is the code:


[1] #### Gnuplot extension methods

class myGnuplot(Gnuplot.Gnuplot):
    # [...]
    def set_eps(self, filename, options = 'enhanced color "Times-Roman" 22'):
        self('set terminal postscript eps ' + options)
        self('set output "' + filename + '"')

    def set_ps(self, filename, options = 'enhanced color "Times-Roman" 22'):
        self('set terminal postscript ' + options)
        self('set output "' + filename + '"')

    def set_x(self):
        self('set terminal x11')

[2] #### quick plot function

def qplot(x, y1=arange(0), y2=arange(0), y3=arange(0)):
    """
    Quick plot Routine

    USAGE::

        qplot(y)          # plots y as a function of a vector [0,1,...,size(y)]
        qplot(x,y)        # plots y(x)
        qplot(x,y1,y2)    # plots y1(x) and y2(x)
        qplot(x,y1,y2,y3) # plots y1(x), y2(x) and y3(x)
    """

    g  = myGnuplot(persist=1, debug=1)
    g('set data style lines')

    if  size(y1) == 0:
        d1 = Data(arange(size(x)), x)
        g.plot(d1, xlabel = "x", ylabel="y")
    elif size(y2) == 0:
        d1 = Data(x, y1, title="y1")
        g.plot(d1, xlabel = "x", ylabel="y")
    elif size(y3) == 0:
        d1 = Data(x, y1, title="y1")
        d2 = Data(x, y2, title="y2")
        g.plot(d1, d2, xlabel = "x", ylabel="y")
    else:
        d1 = Data(x, y1, title="y1")
        d2 = Data(x, y2, title="y2")
        d3 = Data(x, y3, title="y3")
        g.plot(d1, d2, d3, xlabel = "x", ylabel="y")