Re: [Gnuplot-py-users] how to draw a 3D graphic?

[Benny M. <ben...@gm...>]

2008/4/13, zhang chi <zha...@gm...>:
>
> hi
>    I have a 10X10 matrix in python, I want to draw a 3d graphic for this
> matrix by using gnuplot.py.


Zhang, gnuplot contains a test program with examples. Locate the gnuplot
data, and open the test.py file. There you will find code to test the
GridData way of using gnuplot. You find examples of what you want to do. For
your reference, a copy here of that test:

        # set up x and y values at which the function will be tabulated:
        x = numpy.arange(35)/2.0
        y = numpy.arange(30)/10.0 - 1.5
        # Make a 2-d array containing a function of x and y.  First create
        # xm and ym which contain the x and y values in a matrix form that
        # can be `broadcast' into a matrix of the appropriate shape:
        xm = x[:,numpy.newaxis]
        ym = y[numpy.newaxis,:]
        m = (numpy.sin(xm) + 0.1*xm) - ym**2
        wait('a function of two variables from a GridData file')
        g('set parametric')
        g('set data style lines')
        g('set hidden')
        g('set contour base')
        g.xlabel('x')
        g.ylabel('y')
        g.splot(Gnuplot.GridData(m,x,y, binary=0, inline=0))



How to do this work? I try the following code ,but it did not work.
>
> #!/usr/bin/env python
>
> import Gnuplot, Gnuplot.funcutils
> from numpy import *
> import time
>
> g = Gnuplot.Gnuplot(debug=1)
>
> g.set(xrange=(0,10))
> g.set(xrange=(0,10))
> g.set(zrange=(0,10))
> z = ones((10,10))
> g.splot('z')
> time.sleep(5)
>
>
>
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