# Diff of /trunk/doc/examples/poisson.py

revision 155 by jgs, Wed Nov 9 02:02:19 2005 UTC revision 327 by gross, Wed Dec 7 04:32:28 2005 UTC
# Line 1  Line 1
1  # \$Id\$  # \$Id\$
2  from esys.finley import Rectangle  from esys.finley import Rectangle
3  from esys.linearPDEs import Poisson  from esys.escript.linearPDEs import Poisson
4    from esys.escript import whereZero,saveVTK
5  # generate domain:  # generate domain:
6  mydomain = Rectangle(l0=1.,l1=1.,n0=40, n1=20)  mydomain = Rectangle(l0=1.,l1=1.,n0=40, n1=20)
7  # define characteristic function of Gamma^D  # define characteristic function of Gamma^D
8  x = mydomain.getX()  x = mydomain.getX()
9  gammaD = x[0].whereZero()+x[1].whereZero()  gammaD = whereZero(x[0])+whereZero(x[1])
10  # define PDE and get its solution u  # define PDE and get its solution u
11  mypde = Poisson(domain=mydomain,f=1,q=gammaD)  mypde = Poisson(domain=mydomain)
12    mypde.setValue(f=1,q=gammaD)
13  u = mypde.getSolution()  u = mypde.getSolution()
14  # write u to an external file  # write u to an external file
15  u.saveDX("u.dx")  saveVTK("u.xml",solution=u)

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