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Re^4: Fastest way to calculate hypergeometric distribution probabilities (i.e. BIG factorials)?

by BrowserUk (Patriarch)
on Jun 14, 2005 at 14:35 UTC ( [id://466578]=note: print w/replies, xml ) Need Help??


in reply to Re^3: Fastest way to calculate hypergeometric distribution probabilities (i.e. BIG factorials)?
in thread Fastest way to calculate hypergeometric distribution probabilities (i.e. BIG factorials)?

S'neat, but you do loose quite a bit more accuracy than with Math::Pari 

Math::BigInt 19937! = 2.174930234150431374566653562e77066 time: 104.69
+734287262
Math::Pari   19937! = 2.174930234150431374566653166e77066 time:   0.00
+255584716
                                                ^
PP::LogFact  19937! = 2.174930232142160900000000000e77066 (time:  0.03
+0866)
                                ^

[download]

Once you start doing further math with them, those inaccuracies add up fast.

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