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Re: Floating underflow in a plot [message #90772 is a reply to message #90771]

Tue, 14 April 2015 04:32

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

On Tuesday, April 14, 2015 at 3:50:06 AM UTC-4, Miguel wrote:
> I'm trying to plot an implicit function f(x,y)=a by computing the function for many values of x and y and plotting the result.
> But when the number of point (x,y) become too large, there is a problem of floating underflow.
...
>
> Th bla.cat file contains all the points and when I plot them, it seems fine (except for the last value of l)
>
> What is the problem here =

Put aside the floating point underflow message, is there an actual problem with your result? This error indicates a numerical loss of precision but it doesn't always indicate a problem. It's like a butcher who tells you he needs to trim a little more fat than usual.

Craig

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[Message index]

		Floating underflow in a plot By: Miguel on Tue, 14 April 2015 00:50
		Re: Floating underflow in a plot By: Craig Markwardt on Tue, 14 April 2015 04:32
		Re: Floating underflow in a plot By: Miguel on Tue, 14 April 2015 08:53
		Re: Floating underflow in a plot By: Heinz Stege on Tue, 14 April 2015 04:36
		Re: Floating underflow in a plot By: Miguel on Tue, 14 April 2015 08:55
		Re: Floating underflow in a plot By: Heinz Stege on Tue, 14 April 2015 11:28
		Re: Floating underflow in a plot By: Miguel on Wed, 15 April 2015 10:58
		Re: Floating underflow in a plot By: Jeremy Bailin on Wed, 15 April 2015 12:04
		Re: Floating underflow in a plot By: Lajos Foldy on Tue, 14 April 2015 13:04

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