/usr/share/doc/ruby-gsl/examples/pdf/exppow.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 | #!/usr/bin/env ruby
require("gsl")
x = GSL::Vector.linspace(-5, 5, 100)
y1 = GSL::Ran::exppow_pdf(x, 1, 2.5)
y2 = GSL::Ran::exppow_pdf(x, 1, 0.5)
GSL::Vector.graph(x, y1, y2, "-T X -g 3 -C -X x -Y 'p(x)' -x -5 5 -L 'Exppow distribution, a = 1, b = 2.5, 0' --toggle-rotate-y-label")
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