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Ian
Joined: 30 Mar 2004 Posts: 15 Location: Nottingham, UK
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Posted: Tue Apr 13, 2004 4:25 am Post subject: v 1.9.4.3 - More curve fits problems. |
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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 _________________ Stupid comments, spelling mistakes and stating the obvious are all intentional. |
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DPlotAdmin Site Admin
Joined: 24 Jun 2003 Posts: 2311 Location: Vicksburg, Mississippi
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Posted: Tue Apr 13, 2004 7:49 am Post subject: |
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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. _________________ Visualize Your Data
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