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Summer of Code - Getting Started: Difference between revisions
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→Symbolic package: tweaks and formatting
(→Suggested projects: Add Symbolic package project again.) |
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was done by [https://gsoc2016ode15s.blogspot.com/ Francesco Faccio during GSoC 2016]. The code is maintained in the main Octave repository and consists mainly of the following three files: [https://hg.savannah.gnu.org/hgweb/octave/file/tip/libinterp/dldfcn/__ode15__.cc {{path|libinterp/dldfcn/__ode15__.cc}}], [https://hg.savannah.gnu.org/hgweb/octave/file/tip/scripts/ode/ode15i.m {{path|scripts/ode/ode15i.m}}] and [https://hg.savannah.gnu.org/hgweb/octave/file/tip/scripts/ode/ode15s.m {{path|scripts/ode/ode15s.m}}]. | was done by [https://gsoc2016ode15s.blogspot.com/ Francesco Faccio during GSoC 2016]. The code is maintained in the main Octave repository and consists mainly of the following three files: [https://hg.savannah.gnu.org/hgweb/octave/file/tip/libinterp/dldfcn/__ode15__.cc {{path|libinterp/dldfcn/__ode15__.cc}}], [https://hg.savannah.gnu.org/hgweb/octave/file/tip/scripts/ode/ode15i.m {{path|scripts/ode/ode15i.m}}] and [https://hg.savannah.gnu.org/hgweb/octave/file/tip/scripts/ode/ode15s.m {{path|scripts/ode/ode15s.m}}]. | ||
The {{manual|decic}} function for selecting consistent initial conditions for ode15i can be made more Matlab compatible by using [ | The {{manual|decic}} function for selecting consistent initial conditions for ode15i can be made more Matlab compatible by using [http://dx.doi.org/10.1515/JNMA.2002.291 another algorithm]. Another useful extension is to make ode15{i,s} work with datatypes other than double and to improve interpolation at intermediate time steps. | ||
* '''Project size''' [[#Project sizes | [?]]] and '''Difficulty''' | * '''Project size''' [[#Project sizes | [?]]] and '''Difficulty''' | ||
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== Symbolic package == | == Symbolic package == | ||
The [[Symbolic package]] provides symbolic computing and other [https://en.wikipedia.org/wiki/Computer_algebra_system computer algebra system] tools. The main component of Symbolic is a pure m-file class "@sym" which uses the Python package [https://www.sympy.org SymPy] to do (most of) the actual computations. The package aims to expose the | The [[Symbolic package]] provides symbolic computing and other [https://en.wikipedia.org/wiki/Computer_algebra_system computer algebra system] tools. The main component of Symbolic is a pure m-file class "@sym" which uses the Python package [https://www.sympy.org SymPy] to do (most of) the actual computations. The package aims to expose much of the functionality of SymPy while also providing a high level of compatibility with the Matlab Symbolic Math Toolbox. The Symbolic package requires communication between Octave and Python. In 2016 another GSoC project successfully re-implemented this communication using the new [[Pythonic|Pythonic package]]. | ||
This project proposes to | This project proposes to take this work further while also improving the long-term viability of the Symbolic package. Some goals include: | ||
* the possibility of using Pythonic directly rather than as one possible communication layer. For example, we might make "@sym" a subclass of "@pyobject". We also could stop using the "pycall_sympy__" interface and use Pythonic directly from methods. Note: there are open questions about how to do this during a transition time when we still support other IPC mechanisms. | |||
* exposing more functionality of SymPy with ''less glue'' in between. For example, we could allow OO-style method calls such as <code>f.diff(x)</code> as well as <code>diff(f, x)</code>. | |||
* Improvements to the Pythonic package and its long-term maintenance. | |||
* fixing up Symbolic to work with the latest releases of SymPy and Octave. The project has lagged for a few years and needs some efforts to port to recent and upcoming changes in SymPy code. | |||
* making Symbolic easier to maintain. The project currently has a low ''bus factor'': improving the CI, making regular releases easier, improving other aspects of maintenance and making the project more welcoming to newcomers. | |||
Working on this project involves and interesting and challenging mix of m-file code, Python code, and in the case of Pythonic, perhaps some lower-level C code. | |||
* '''Project size''' [[#Project sizes | [?]]] and '''Difficulty''' | * '''Project size''' [[#Project sizes | [?]]] and '''Difficulty''' | ||
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* '''Project size''' [[#Project sizes | [?]]] and '''Difficulty''' | * '''Project size''' [[#Project sizes | [?]]] and '''Difficulty''' | ||
: ~ | : ~175 hours (medium) | ||
* '''Required skills''' | * '''Required skills''' | ||
: Octave, C/C++ | : Octave, C/C++ | ||
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* '''Project size''' [[#Project sizes | [?]]] and '''Difficulty''' | * '''Project size''' [[#Project sizes | [?]]] and '''Difficulty''' | ||
: ~ | : ~175 hours (easy) | ||
* '''Required skills''' | * '''Required skills''' | ||
: Octave, C/C++ | : Octave, C/C++ | ||