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September 2017 Update

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Ingy döt Net 2017-09-23 10:01:46 +02:00
parent bba7bfd280
commit ba8067c3b7
14570 changed files with 153136 additions and 63871 deletions
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19
Task/Gamma-function/Haskell/gamma-function-1.hs
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@ -1,10 +1,21 @@
cof :: [Double]
cof = [76.18009172947146,-86.50532032941677,24.01409824083091,-1.231739572450155,0.001208650973866179,-0.000005395239384953]
cof =
[ 76.18009172947146
, -86.50532032941677
, 24.01409824083091
, -1.231739572450155
, 0.001208650973866179
, -0.000005395239384953
]
ser :: Double
ser = 1.000000000190015
gammaln :: Double -> Double
gammaln xx = let tmp' = (xx+5.5) - (xx+0.5)*log(xx+5.5)
ser' = ser + sum (zipWith (/) cof [xx+1..])
in -tmp' + log(2.5066282746310005 * ser' / xx)
gammaln xx =
let tmp_ = (xx + 5.5) - (xx + 0.5) * log (xx + 5.5)
ser_ = ser + sum (zipWith (/) cof [xx + 1 ..])
in -tmp_ + log (2.5066282746310005 * ser_ / xx)
main :: IO ()
main = mapM_ print $ gammaln <$> [0.1,0.2 .. 1.0]