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lgamma

Math.lgamma(x) â [float, -1 or 1]

Class Public methods

Calculates the logarithmic gamma of x and the sign of gamma of x.

::lgamma is same as

[Math.log(Math.gamma(x).abs), Math.gamma(x) < 0 ? -1 : 1]

but avoid overflow by ::gamma for large x.

doc_ruby_on_rails

2015-04-18 02:15:07

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