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annotate subsSymfun.m @ 1015:9b7fcd5e4480 feature/advectionRV

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Debug ResidualViscosity - Pass exact time derivative to RungeKuttaExteriorRV and use that for evaluating the residual - Start bootstrapping from later time level with higher order bdf
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Thu, 06 Dec 2018 17:03:22 +0100
parents 489bea7fc33f
children
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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
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2 % f remains a symbolic function. If any of it's arguments is eliminated
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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
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5 function f = subsSymfun(f, old, new)
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6 args = argnames(f);
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7
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8 newExpr = subs(f, old, new);
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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