Contents

#!/usr/bin/env ruby
require("gsl")

N = 2048
SAMPLING = 1000   # 1 kHz
TMAX = 1.0/SAMPLING*N
FREQ1 = 50
FREQ2 = 120
t = GSL::Vector.linspace(0, TMAX, N)
x = GSL::Sf::sin(2*Math::PI*FREQ1*t) + GSL::Sf::sin(2*Math::PI*FREQ2*t)
y = x.fft

y2 = y.subvector(1, N-2).to_complex2
mag = y2.abs
phase = y2.arg
f = GSL::Vector.linspace(0, SAMPLING/2, mag.size)
GSL::graph(f, mag, "-C -g 3 -x 0 200 -X 'Frequency [Hz]'")

Version data entries

22 entries across 22 versions & 4 rubygems

Version	Path
gsl-2.1.0.3	examples/fft/fft.rb
gsl-2.1.0.2	examples/fft/fft.rb
gsl-2.1.0.1	examples/fft/fft.rb
gsl-2.1.0	examples/fft/fft.rb
gsl-1.16.0.6	examples/fft/fft.rb
rb-gsl-1.16.0.5	examples/fft/fft.rb
rb-gsl-1.16.0.4	examples/fft/fft.rb
rb-gsl-1.16.0.3	examples/fft/fft.rb
rb-gsl-1.16.0.3.rc1	examples/fft/fft.rb
gsl-nmatrix-1.15.3.2	examples/fft/fft.rb
gsl-nmatrix-1.15.3.1	examples/fft/fft.rb
rb-gsl-1.16.0.2	examples/fft/fft.rb
rb-gsl-1.16.0.1	examples/fft/fft.rb
rb-gsl-1.16.0	examples/fft/fft.rb
rb-gsl-1.15.3.2	examples/fft/fft.rb
rb-gsl-1.15.3.1	examples/fft/fft.rb
blackwinter-gsl-1.15.3.2	examples/fft/fft.rb
gsl-nmatrix-1.15.3.0	examples/fft/fft.rb
gsl-1.15.3	examples/fft/fft.rb
gsl-1.14.7	examples/fft/fft.rb