/[escript]/trunk/doc/examples/usersguide/poisson_matplotlib.py
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Revision 2578 - (hide annotations)
Tue Aug 4 04:05:36 2009 UTC (11 years, 1 month ago) by jfenwick
File MIME type: text/x-python
File size: 1970 byte(s)
Fixed problem with unit tests
1 gross 2574
2     ########################################################
3     #
4     # Copyright (c) 2003-2009 by University of Queensland
5     # Earth Systems Science Computational Center (ESSCC)
6     # http://www.uq.edu.au/esscc
7     #
8     # Primary Business: Queensland, Australia
9     # Licensed under the Open Software License version 3.0
10     # http://www.opensource.org/licenses/osl-3.0.php
11     #
12     ########################################################
13    
14     __copyright__="""Copyright (c) 2003-2009 by University of Queensland
15     Earth Systems Science Computational Center (ESSCC)
16     http://www.uq.edu.au/esscc
17     Primary Business: Queensland, Australia"""
18     __license__="""Licensed under the Open Software License version 3.0
19     http://www.opensource.org/licenses/osl-3.0.php"""
20     __url__="https://launchpad.net/escript-finley"
21    
22     from esys.escript import *
23     from esys.escript.linearPDEs import Poisson
24     from esys.finley import Rectangle
25     import numpy
26     import matplotlib
27    
28     import pylab
29    
30 jfenwick 2578 #Testing whether we have a late enough version of matplotlib
31     try:
32     matplotlib.mlab.griddata
33     # generate domain:
34     mydomain = Rectangle(l0=1.,l1=1.,n0=40, n1=20)
35     # define characteristic function of Gamma^D
36     x = mydomain.getX()
37     gammaD = whereZero(x[0])+whereZero(x[1])
38     # define PDE and get its solution u
39     mypde = Poisson(domain=mydomain)
40     mypde.setValue(f=1,q=gammaD)
41     u = mypde.getSolution()
42    
43     # interpolate u to a matplotlib grid:
44     x_grid = numpy.linspace(0.,1.,50)
45     y_grid = numpy.linspace(0.,1.,50)
46     x=mydomain.getX()[0].toListOfTuples()
47     y=mydomain.getX()[1].toListOfTuples()
48     z=interpolate(u,mydomain.getX().getFunctionSpace()).toListOfTuples()
49     z_grid = matplotlib.mlab.griddata(x,y,z,xi=x_grid,yi=y_grid )
50     # interpolate u to a rectangular grid:
51     matplotlib.pyplot.contourf(x_grid, y_grid, z_grid, 5)
52     matplotlib.pyplot.savefig("u.png")
53     # uncommend this line if you want to interact with a plot window
54     matplotlib.pyplot.show()
55 gross 2574
56 jfenwick 2578 except AttributeError:
57     print "Your version of matplotlib does not provide the griddata method.\nSkipping example.\n"

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