Class: RandomVariateGenerator::PoissonVariate

Inherits:
RandomVariate show all
Defined in:
lib/random_variate_generator/poisson_variate.rb

Instance Method Summary collapse

Methods inherited from RandomVariate

create

Constructor Details

#initialize(params = {}) ⇒ PoissonVariate

Returns a new instance of PoissonVariate.



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# File 'lib/random_variate_generator/poisson_variate.rb', line 4

def initialize(params = {})
   if params[:lambda]
     @lambda = params[:lambda] 
   else
     raise InvalidParameterException.new "Parameter :lambda no specified"
   end
   raise InvalidParameterException.new "Parameter :lambda must be greater than 0" if @lambda <= 0
end

Instance Method Details

#generate_value ⇒ Object 



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# File 'lib/random_variate_generator/poisson_variate.rb', line 13

def generate_value
  Random.poisson(:lambda => @lambda)
end