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Re: Quick integral.
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 ? -- -------------------------------------- Informatique scientifique et technique http://www.dxdydz.net Jean-Marie Thomas mailto:jmt at dxdydz.net +33 (0)3 88 32 93 64