Summer of Code - Getting Started: Difference between revisions

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The recent GNU Octave [[Interval_package|interval package]] provides several arithmetic functions with accurate and guaranteed error bounds. Its development started in the end of 2014 and there is some fundamental functionality left to be implemented.
The recent GNU Octave [[Interval_package|interval package]] provides several arithmetic functions with accurate and guaranteed error bounds. Its development started in the end of 2014 and there is some fundamental functionality left to be implemented.


Currently, everything is console/text only and the @infsup class needs functions for plotting intervals in graphs as lines, rectangles or boxes. For examples of how the result may look like, see images [http://www.maplesoft.com/applications/view.aspx?SID=4858&view=html] and [http://en.wikipedia.org/wiki/Interval_arithmetic]. These functions shall be developed for inclusion in the interval package for end users and will be used for the package's documentation.
Currently, everything is console/text only and the @infsup class needs functions for plotting intervals in graphs as lines, rectangles or boxes. For examples of how the result may look like, see images [http://www.maplesoft.com/applications/view.aspx?SID=4858&view=html] and [http://en.wikipedia.org/wiki/Interval_arithmetic]. These functions shall be developed for inclusion in the interval package for end users and will also be used for the package's documentation.


If the student has previous knowledge in interval arithmetic algorithms, is is also possible to implement the functions <code>polyval</code>, <code>fsolve</code>, and possibly <code>roots</code> (as m-files). Algorithms can be migrated from the C-XSC Toolbox (C++ code) from [http://www2.math.uni-wuppertal.de/wrswt/xsc/cxsc_new.html] (see rpeval.cpp, nlinsys.cpp, and cpzero.cpp respectively). All arithmetic operations required by these algorithms already exist in the package.
If the student has previous knowledge in interval arithmetic algorithms, is is also possible to implement the functions <code>polyval</code>, <code>fsolve</code>, and possibly <code>roots</code> (as m-files). Algorithms can be migrated from the C-XSC Toolbox (C++ code) from [http://www2.math.uni-wuppertal.de/wrswt/xsc/cxsc_new.html] (see rpeval.cpp, nlinsys.cpp, and cpzero.cpp respectively). All arithmetic operations required by these algorithms already exist in the package.
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