Class: SPCore::LanczosWindow

Inherits:
Object
  • Object
show all
Defined in:
lib/spcore/windows/lanczos_window.rb

Overview

For more info, see en.wikipedia.org/wiki/Window_function#Lanczos_window.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(size) ⇒ LanczosWindow

Returns a new instance of LanczosWindow.



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# File 'lib/spcore/windows/lanczos_window.rb', line 7

def initialize size
  @data = Array.new size
  sinc = lambda {|x| (Math::sin(Math::PI * x))/(Math::PI * x) }
  size.times do |n|
    @data[n] = sinc.call(((2.0*n)/(size-1)) - 1)
  end
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/spcore/windows/lanczos_window.rb', line 6

def data
  @data
end