Class: ERV::UniformDistribution

Inherits:
Distribution show all
Defined in:
lib/erv/uniform_distribution.rb

Instance Method Summary collapse

Methods inherited from Distribution

#sample

Constructor Details

#initialize(opts) ⇒ UniformDistribution

Returns a new instance of UniformDistribution.

Raises:

  • (ArgumentError) 


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# File 'lib/erv/uniform_distribution.rb', line 13

def initialize(opts)
  super(opts)

  raise ArgumentError unless opts[:max_value]
  max = opts[:max_value].to_f
  min = opts[:min_value].try(:to_f) || 0.0

  if RUBY_PLATFORM == 'java'
    # create distribution
    d = UniformRealDistribution.new(@rng, min, max,
            UniformRealDistribution::DEFAULT_INVERSE_ABSOLUTE_ACCURACY)
    # setup sampling function
    @func = Proc.new { d.sample }
  else
    # setup sampling function
    @func = Proc.new { @rng.flat(min, max) }
  end
end