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annotate subsSymfun.m @ 1031:2ef20d00b386 feature/advectionRV

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For easier comparison, return both the first order and residual viscosity when evaluating the residual. Add the first order and residual viscosity to the state of the RungekuttaRV time steppers
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Thu, 17 Jan 2019 10:25:06 +0100
parents 489bea7fc33f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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);
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7
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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
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11 newArgs = args(ismember(args,vars));
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12
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13 f = symfun(newExpr, newArgs);
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14 end