/usr/share/doc/ruby-gsl/examples/matrix/complex.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 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | #!/usr/bin/env ruby
# Turn on warnings
$-w = true
require 'irb/xmp'
require 'gsl'
# Apparently, IRB::Frame has a bug that prevents the defaults from working, so
# an XMP instance must be created explicitly this way instead of using the
# otherwise convenient xmp method.
XMP.new(IRB::Frame.top(-1)).puts <<END
# Create 3x3 Matrix::Complex mz
mz = GSL::Matrix::Complex.alloc(3, 3)
# Set element at row 1, column 2 to 3+5.6i
mz.set(1, 2, GSL::Complex[3, 5.6])
# Get element at row 1, column 2
a = mz.get(1, 2)
# Create Matrix::Complex::View of mz
# starting at row 1, column 1 and
# spanning 2 rows and 2 columns
mzv = mz.submatrix(1, 1, 2, 2)
# Create a Vector::Complex::View for row 1 of mz
row = mz.row(1)
# Create a Vector::Complex::Col::View for column 2 of mz
col = mz.col(2)
# Iterate through rows of mz
mz.each_row do |v|
p v
end
# Iterate through columns of mz
mz.each_col do |v|
p v
end
END
|