Method: Charty::Plotters::SimpleNormalizer#call

Defined in:
lib/charty/plotters/relational_plotter.rb

#call(value, clip = nil) ⇒ Object 



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# File 'lib/charty/plotters/relational_plotter.rb', line 48

def call(value, clip=nil)
  scalar_p = false
  vector_p = false
  case value
  when Charty::Vector
    vector_p = true
    value = value.to_a
  when Array
    # do nothing
  else
    scalar_p = true
    value = [value]
  end

  @vmin = value.min if vmin.nil?
  @vmax = value.max if vmax.nil?

  result = value.map {|x| (x - vmin) / (vmax - vmin).to_f }

  case
  when scalar_p
    result[0]
  when vector_p
    Charty::Vector.new(result, index: value.index)
  else
    result
  end
end