Sha256: 79570fa4155ee426926a26205e77d44809bd05001a3c14f77434579db7bf6566
Contents?: true
Size: 462 Bytes
Versions: 7
Compression:
Stored size: 462 Bytes
Contents
module Distribution
module Poisson
module Ruby_
class << self
def pdf(k,l )
(l**k*Math.exp(-l)).quo(Math.factorial(k))
end
def cdf(k,l)
Math.exp(-l)*(0..k).inject(0) {|ac,i| ac+ (l**i).quo(Math.factorial(i))}
end
def p_value(prob,l)
ac=0
(0..100).each do |i|
ac+=pdf(i,l)
return i if prob<=ac
end
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems