/usr/share/doc/ruby-gsl/examples/sf/bessel_JY.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 13 | #!/usr/bin/env ruby
require("gsl")
n = 100
x = GSL::Vector.linspace(0.01, 20, n)
J0 = GSL::Sf::bessel_J0(x)
J1 = GSL::Sf::bessel_J1(x)
J2 = GSL::Sf::bessel_Jn(2, x)
y0 = GSL::Sf::bessel_Y0(x)
y1 = GSL::Sf::bessel_Y1(x)
y2 = GSL::Sf::bessel_Yn(2, x)
GSL::Vector.graph(x, J0, J1, J2, y0, y1, y2, "-T X -C -g 3 -y -2 1.1 -X x -L 'Bessel functions J0, J1, J2, Y0, Y1, Y2'")
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