/usr/share/doc/ruby-gsl/examples/gallery/cayley.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 7 8 9 10 11 12 | #!/usr/bin/env ruby
require("gsl")
a = 1
t = GSL::Vector.linspace(0, 3*Math::PI, 100)
cost = GSL::Sf::cos(t/3)
cost3 = cost*cost*cost
r = 4*a*cost3
x = r*GSL::Sf::cos(t)
y = r*GSL::Sf::sin(t)
GSL::graph(x, y, "-T X -C")
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