module ML::Util
Public Instance Methods
normal_distribution(mean, variance)
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# File lib/util/util.rb, line 5 def normal_distribution mean, variance if @y y = @y @y = nil return y end theta = 2 * Math::PI * rand rho = Math.sqrt(-2 * Math.log(1 - rand)) scale = variance * rho x = mean + scale * Math.cos(theta) @y = mean + scale * Math.sin(theta) x end