RE: Does Mathematica calculate really so long?
- To: mathgroup at smc.vnet.net
- Subject: [mg34386] RE: [mg34361] Does Mathematica calculate really so long?
- From: David.Annetts at csiro.au
- Date: Fri, 17 May 2002 06:31:26 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Hi Andrei,
> I began to use Mathematica some monthes ago. And already I have small
> problems. I make about 250x10000 Monte-Carlo Simulations. My programme
> calculates it about 2 hours. Is it really so long? Maybe it's a
> mistake of my programm. Und there are some tricks to make a
> calculation more quick?
No one will know unless you post either the entire code, or just an excerpt
which isolates the bottleneck.
Generally, you should be staying away from Do[...], For[...] and other
favourites, employing Map[...] and similar functions wherever possible.
That said, it might be that you're better off with F90/C++/<any compiled
code> than Mathematica for certain parts of your calculations.
Regards,
Dave.
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Dr. David Annetts EM Modelling Analyst
Tel: (+612) 9490 5416 CSIRO DEM, North Ryde
Fax: (+612) 9490 5467 David.Annetts at csiro.au
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