/usr/share/doc/ruby-gsl/examples/sf/transport.rb is in ruby-gsl 2.1.0.3+dfsg1-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | #!/usr/bin/env ruby
require("gsl")
n = 50
x = GSL::Vector.linspace(0, 2, n)
y2 = GSL::Sf::transport_2(x)
y3 = GSL::Sf::transport_3(x)
y4 = GSL::Sf::transport_4(x)
y5 = GSL::Sf::transport_5(x)
GSL::Vector.graph(x, y2, y3, y4, y5, "-T X -C -g 3 -X x -Y 'J(x)' --toggle-rotate-y-label -L 'Transport functions'")
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