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Interval package

542 bytes added, 15:26, 1 June 2016
** To be considered in the future: Algorithms can be migrated from the C-XSC Toolbox (C++ code) from [http://www2.math.uni-wuppertal.de/wrswt/xsc/cxsc_new.html] (nlinsys.cpp and cpzero.cpp), however these would need gradient arithmetic and complex arithmetic.
** Interval version of <code>interp1</code>
** The [http://capd.ii.uj.edu.pl/ CAPD package] contains an algorithm for QR factorization. Analyze. Migrate.
** Extend <code>subsasgn</code> to allow direct manipulation of inf and sup properties.
>> A = infsup ("[2, 4]");
>> A.inf = infsup ("[1, 3]")
A = [1, 4]
>> A.inf = 5
A = [Empty]
** While at it, also allow multiple subscripts in <code>subsasgn</code>
>> A(:)(2:4)(2) = 42; # equivalent to A(3) = 42
>> A.inf(3) = 42; # also A(3).inf = 42
>> A.inf.inf = 42 # should produce error?
>> A.inf.sup = 42 # should produce error?
== Compatibility ==
240

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