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annotate subsSymfun.m @ 1037:2d7ba44340d0 feature/burgers1d

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Pass scheme specific parameters as cell array. This will enabale constructDiffOps to be more general. In addition, allow for schemes returning function handles as diffOps, which is currently how non-linear schemes such as Burgers1d are implemented.
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 18 Jan 2019 09:02:02 +0100
parents 489bea7fc33f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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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));
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12
489bea7fc33f Add some functions to make symbolic life easier
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13 f = symfun(newExpr, newArgs);
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14 end