Katie, > I do apologise for that mistake. I hope that what I attach now is OK.
The picture I get from running this program looks different than the one you had posted before (mine is attached, I used visit for visualization but it looks similar with gnuplot). In particular, the overshoots are now along the entire line of discontinuity and I do in fact get undershoots. Does the solution not look like this for you? Also: This is how the projection of a discontinuous function looks like. You get over and undershoots, that's just how it is -- it's called Gibbs phenomenon. If you don't want those, use an interpolation instead. Best W. ------------------------------------------------------------------------- Wolfgang Bangerth email: [email protected] www: http://www.math.tamu.edu/~bangerth/
<<attachment: visit0000.png>>
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