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annotate subsSymfun.m @ 599:489bea7fc33f feature/grids

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Add some functions to make symbolic life easier
author Jonatan Werpers <jonatan@werpers.com>
date Tue, 26 Sep 2017 15:38:25 +0200
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599
489bea7fc33f Add some functions to make symbolic life easier
Jonatan Werpers <jonatan@werpers.com>
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1 % Subs for a symfun
489bea7fc33f Add some functions to make symbolic life easier
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2 % f remains a symbolic function. If any of it's arguments is eliminated
489bea7fc33f Add some functions to make symbolic life easier
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3 % it is removed from the argument list while preserving the order of the
489bea7fc33f Add some functions to make symbolic life easier
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4 % other arguments
489bea7fc33f Add some functions to make symbolic life easier
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5 function f = subsSymfun(f, old, new)
489bea7fc33f Add some functions to make symbolic life easier
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6 args = argnames(f);
489bea7fc33f Add some functions to make symbolic life easier
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7
489bea7fc33f Add some functions to make symbolic life easier
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8 newExpr = subs(f, old, new);
489bea7fc33f Add some functions to make symbolic life easier
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9 vars = symvar(subs(args, old, new));
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10
489bea7fc33f Add some functions to make symbolic life easier
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11 newArgs = args(ismember(args,vars));
489bea7fc33f Add some functions to make symbolic life easier
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12
489bea7fc33f Add some functions to make symbolic life easier
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13 f = symfun(newExpr, newArgs);
489bea7fc33f Add some functions to make symbolic life easier
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14 end