Re: Quick integral.
- To: mathgroup at smc.vnet.net
- Subject: [mg73441] Re: [mg73393] Quick integral.
- From: jmt <jmt at dxdydz.net>
- Date: Fri, 16 Feb 2007 01:06:57 -0500 (EST)
- References: <200702151001.FAA05398@smc.vnet.net>
On Thursday 15 February 2007 11:01, Jouvenot, Fabrice wrote:
> The purpose of our work is to have something really quick.
> We made some simplifications, approximations, etc.
>
> We have now difficulties to accelerate it.
> We think we can run it faster if we ask Mathematica to calculate our
> integrals with only 2 significant numbers. But we tuned different
> parameters of Intergral to have a rude approximation of the integral and
> so have the calculus quicker than before.
> But (we are beginers with mathematica (but not in programing)) it do not
> seems to be less precise or faster.
>
As far as I understand, you can extend the precision of your computation, but
can hardly restraint it, because a restrained precision will finally always
use the default plateform floating point facilities (see $MachinePrecision),
these being faster than any other implementation you can make.
May I suggest you change the strategy for computing your numerical integral ?
--
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Informatique scientifique et technique
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Jean-Marie Thomas
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- References:
- Quick integral.
- From: "Jouvenot, Fabrice" <F.Jouvenot@liverpool.ac.uk>
- Quick integral.