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Revision 2474 - (hide annotations)
Tue Jun 16 06:32:15 2009 UTC (10 years, 2 months ago) by gross
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linearPDEs has is now using the SolverOptions class to talk to PASO
1 jfenwick 2463
2     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3     %
4     % Copyright (c) 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     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
14     \section{Changes from previous releases}
15     \label{app:changes}
17     \subsection*{2.0 to 3.0}
18 gross 2474 \begin{itemize}
19     \item The major change here was replacing \module{numarray} with \numpy.
20 jfenwick 2463 For general instructions on converting scripts to use numpy see \url{http://www.stsci.edu/resources/software_hardware/numarray/numarray2numpy.pdf}.
21     The specific changes to \escript are:
22     \begin{itemize}
23     \item getValueOfDataPoint() which returned a \module{numarray}.array has been replaced by
24     getTupleForDataPoint() which returns a \PYTHON tuple containing
25 gross 2470 the components of the data point. In the case of matricies or higher ranked data, the tuples will be nested. Use
26     \numpy.array(data.getTupleForDataPoint()) if a \numpyNDA opbject is required.
27 jfenwick 2463 \item getValueOfGlobalDataPoint has similarly been replaced by getTupleForGlobalDataPoint().
28     \item integrate(data) now returns a \numpyNDA instead of a \module{numarray}.array.
29     \end{itemize}
30     Any python methods which previously accepted \module{numarray} objects will accept \numpy objects instead.
32 gross 2474 \item
33     The way solver options are defined for \LinearPDE objects has been changed. There is now a \SolverOptions object attached to the \LinearPDE object which is handeling the options of solvers used to solve the PDE. The following changes apply:
34     \begin{itemize}
35     \item The \method{setTolerance} and \method{setAbsoluteTolerance} methods have been removed. Use now \method{getSolverOptions().setTolerance}
36     and \method{getSolverOptions().setAbsoluteTolerance}
38     \item The \method{setSolverPackage} and \method{setSolverMethod} methods have been removed. Use now \method{getSolverOptions().setPackage},
39     \method{getSolverOptions().setSolverMethod} and
40     \method{getSolverOptions().setPreconditioner}.
42     \item The \method{setSolverPackage} and \method{setSolverMethod} methods have been removed. Use now \method{getSolverOptions().setPackage},
43     \method{getSolverOptions().setSolverMethod} and
44     \method{getSolverOptions().setPreconditioner}.
46     \item The static class variables defining packages, solvers and preconditioners have been removed and are now accessed via the corresponding static class variables in \SolverOptions. For instance use \method{SolverOptions.PCG} instead of
47     \method{LinearPDE.PCG} to select the preconditioned conjugate gradient method.
49     \item The \method{getSolution} takes now no argument. Use the corresponding
50     methods of the \SolverOptions object returned by \method{getSolverOptions()}
51     to set values, e.g. use
52     \method{getSolverOptions().setVerbosityOn()} instead of argument \code{verbose=True}
53     and \method{getSolverOptions().setIterMax(1000)} instead of argument \code{iter_max=1000}
54     \end{itemize}
57     \end{itemize}

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