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Ian · Joined: 30 Mar 2004 Posts: 15 Location: Nottingham, UK

Hi there David.

When i run Generate>More curve fits> y=[Ax+B]/[x+C] all the way through the functions to the Friedlander's equation, on a graph of y=5+5x DPlot just closes with no warning.

Any idea what could be causing this?

Kind regards,
Ian
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Stupid comments, spelling mistakes and stating the obvious are all intentional.

DPlotAdmin · Posted: Tue Apr 13, 2004 7:49 am Post subject:

There are at least a couple of problems, both due to this equation form being very poorly suited for your input (this equation is generally used for exponentially decaying airblast, as in ex11.grf).

I get a division by zero when the extents of my 5+5*x line are +/- the same value, e.g. -10<x<10, such that the "impulse" - the area under the curve, was 0. And in other cases I get a "float overflow", indicating that the solution is blowing up to very large numbers very quickly. Thanks for pointing out the problem, I'll have this fixed next release.
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