/usr/share/doc/ruby-gsl/examples/pdf/cauchy.rb is in ruby-gsl 2.1.0.3+dfsg1-1build1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 | #!/usr/bin/env ruby
require("gsl")
x = GSL::Vector.linspace(-5, 5, 100)
y1 = GSL::Ran::cauchy_pdf(x, 1)
y2 = GSL::Ran::cauchy_pdf(x, 2)
GSL::Vector.graph(x, y1, y2, "-T X -g 3 -C -X x -Y 'p(x)' -x -5 5 -y 0 0.4 -L 'Cauchy distribution, a = 1, 2' --toggle-rotate-y-label")
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