annotate +util/semidiscrete2function.m @ 774:66eb4a2bbb72
feature/grids
Remove default scaling of the system.
The scaling doens't seem to help actual solutions. One example that fails in the flexural code.
With large timesteps the solutions seems to blow up. One particular example is profilePresentation
on the tdb_presentation_figures branch with k = 0.0005
| author |
Jonatan Werpers <jonatan@werpers.com> |
| date |
Wed, 18 Jul 2018 15:42:52 -0700 |
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48b6fb693025 |
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| rev |
line source |
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0
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1 function F = semidiscrete2function(D,S)
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2 % TODO: Find threshhold when sparse makes sense.
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3 % TODO: Why does having the spase block slow down convergence.m (or does it?)
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4 if size(D,1) > 500
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5 D = sparse(D);
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6 end
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7
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8 if ~isa(S,'function_handle')
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9 F = @(w,t)(D*w + S);
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10 else
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11 F = @(w,t)(D*w + S(t));
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12 end
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13 end
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