19 lines
335 B
Ruby
19 lines
335 B
Ruby
module Math
|
|
|
|
# Logarithmus naturalis of gamma function of `x`.
|
|
#
|
|
# Notice the use of `ln` prefix to differentiate from
|
|
# Ruby's built-in `#lgamma` function which returns an Array.
|
|
#
|
|
def self.lngamma(x)
|
|
lgamma(x).first
|
|
end
|
|
|
|
# Old name used by Extmath library.
|
|
def self.ln_gamma(x)
|
|
lgamma(x).first
|
|
end
|
|
|
|
end
|
|
|