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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 %
4 % Copyright (c) 2009-2010 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*{3.1 to 3.2}
18 \begin{itemize}
19 \item The deprecated name for the launcher has been removed. To run scripts use \emph{run-escript} not \emph{escript}.
20 \item \module{esys.escript} is no longer automatically imported by importing \module{esys.finley}. You will need to import escript explicitly.
21 (All of our example scripts do this anyway.)
22 \item An experimental version of the new Dudley domain is now available.
23 \item Various bug fixes and optimisations.
24 \item New algorithms for gmsh support.
25 \item Improvements to the AMG solver.
26 \item Fixed compilation issues using netcdf.
27 \item Redesigned configuration files to make it easier to compile from source without finding the locations of all your libraries.
28 \item Expanded version of the escript cookbook.
29 \item Faster rendering of documentation.
30 \item Documentation is now hyperlinked.
31 \item New data export and checkpointing with the Weipa module.
32 \end{itemize}
34 \subsection*{3.0 to 3.1}
35 \begin{itemize}
36 \item The \emph{escript} launcher has been renamed to \emph{run-escript}. The
37 old name will still work in this version but will be removed in the future.
38 \item Lazy evaluation features have been improved and documented (see \Sec{sec:lazy}).
39 \item The \emph{escript} documentation now includes a new Cookbook which
40 demonstrates how to solve sample problems using escript.
41 \item Macro elements have been introduced.
42 \item The \var{saveDataCSV} method allows one or more \Data objects to be
43 exported in CSV format (see \Sec{sec:savedatacsv}).
44 \item \Data objects can be populated by interpolating from values in a table.
45 \item The new \var{getInfLocator} and \var{getSupLocator} functions in
46 \pdetools return Locators to a minimal/maximal point over the
47 data.
48 \item There is a new class to model fault systems (\var{esys.escript.faultsystems.FaultSystem}).
49 \item A beta version of an Algebraic Multigrid (AMG) solver is included.
50 \item Inverting square matrices larger than 3x3 is now permitted if escript is
51 compiled with Lapack support.
52 \item If escript is compiled with a modern compiler, then inf/sup/Lsup will now
53 report NaN, +/-inf as appropriate if those values appear in the data.
54 \item Data.setTags will take tag names as well as tag numbers.
55 \item The Scalar, Vector, Tensor, Tensor3, Tensor4 factory methods can now take
56 arrays/nested sequence like objects as their initial values.
57 \item escript.util.mkDir can now take a list of directories to create.
58 \item Behind the scenes, \PYTHON docstrings have been rewritten from epydoc to
59 restructured text.
60 \item Various other bug fixes and performance tweaks.
61 \end{itemize}
63 \subsection*{2.0 to 3.0}
64 \begin{itemize}
65 \item The major change here was replacing \module{numarray} with \numpy.
66 For general instructions on converting scripts to use numpy see \url{http://www.stsci.edu/resources/software_hardware/numarray/numarray2numpy.pdf}.
67 The specific changes to \escript are:
68 \begin{itemize}
69 \item getValueOfDataPoint() which returned a \module{numarray}.array has been
70 replaced by getTupleForDataPoint() which returns a \PYTHON tuple
71 containing the components of the data point. In the case of matrices or
72 higher ranked data, the tuples will be nested.
73 Use \numpy.array(data.getTupleForDataPoint()) if a \numpyNDA object is
74 required.
75 \item getValueOfGlobalDataPoint() has similarly been replaced by
76 getTupleForGlobalDataPoint().
77 \item \code{integrate(data)} now returns a \numpyNDA instead of a
78 \module{numarray}.array.
79 \end{itemize}
80 Any python methods which previously accepted \module{numarray} objects now
81 accept \numpy objects instead.
83 \item The way to define solver options for \LinearPDE objects has changed.
84 There is now a \SolverOptions object attached to the \LinearPDE
85 object which handles the options of solvers used to solve the PDE.
86 The following changes apply:
87 \begin{itemize}
88 \item The \method{setTolerance} and \method{setAbsoluteTolerance} methods
89 have been removed. Instead use \method{setTolerance} and
90 \method{setAbsoluteTolerance} on the \SolverOptions object. For example:
91 \method{getSolverOptions().setTolerance(\ldots)}
92 \item The \method{setSolverPackage} and \method{setSolverMethod} methods have
93 been removed. Instead use the methods \method{setPackage},
94 \method{setSolverMethod} and \method{setPreconditioner}. For example:
95 getSolverOptions().setPackage(\ldots).
96 \item The static class variables defining packages, solvers and
97 preconditioners have been removed and are now accessed via the
98 corresponding static class variables in \SolverOptions.
99 For instance use \method{SolverOptions.PCG} instead of
100 \method{LinearPDE.PCG} to select the preconditioned conjugate gradient
101 method.
102 \item The \method{getSolution} now takes no argument. Use the corresponding
103 methods of the \SolverOptions object returned by
104 \method{getSolverOptions()} to set values,\\ e.g. use
105 \method{getSolverOptions().setVerbosityOn()} instead of argument
106 \code{verbose=True} and \method{getSolverOptions().setIterMax(1000)}
107 instead of argument \code{iter_max=1000}.
108 \end{itemize}
110 \item The \pyvisi module from previous releases has been deprecated and will no
111 longer be supported. It is still present in the source code and can be used
112 if you compile \escript from source. It will not be available in binary
113 releases and its use is discouraged.
114 \emph{The documentation for \pyvisi is not available in this release.}
115 % The documentation for \pyvisi can be found in Appendix~\ref{PYVISI CHAP}.
116 \end{itemize}

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