class SPCore::BlackmanWindow
Produces a Blackman window of a given size (number of samples). For more info, see en.wikipedia.org/wiki/Window_function#Blackman_windows.
Attributes
data[R]
Public Class Methods
new(size)
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# File lib/spcore/windows/blackman_window.rb, line 6 def initialize size @data = Array.new size alpha = 0.16 a0 = (1 - alpha) / 2.0 a1 = 0.5 a2 = alpha / 2.0 size.times do |n| @data[n] = a0 - (a1 * Math::cos((TWO_PI * n)/(size - 1))) + (a2 * Math::cos((FOUR_PI * n)/(size - 1))) end end