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Re: computational efficiency

by moritz (Cardinal)
on Oct 05, 2011 at 10:01 UTC ( #929746=note: print w/ replies, xml ) Need Help??


in reply to computational efficiency

First focus on which one is correct. $cosine = sqrt(1 - $sine**2) will only give you non-negative $cosine values, so that solution will only cover 2 of four possible quandrants.

In cases involving random numbers, it helps to know the theory of how probability density functions are transformed; if you don't want to learn the theory, at least create a few hundred or thousand random points with each method you consider, and plot them in some way -- either in a histogram, or in a density plot or so. That way you have a chance to see if the resulting distribution is what you want.

MJD #11963, It's easy to get the *wrong* answer in O(1) time.


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