#!/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 test vector v v = GSL::Vector.alloc(1, 2, 3, 4, 5, 6, 7, 8, 9) # Create Vector::View of Vector v starting at element 2 and spanning 3 elements vv = v.subvector(2, 3) # Set element 1 of View to 9.0 vv.set(1, 9) # Show that Vector is also modified v # Create Matrix::View of Vector m = v.matrix_view(3, 3) # Create Vector::View spanning the entire Vector v2 = v.view # Create Vector::View of Vector starting at element 0 and spanning 3 elements v2 = v.view(3) # Show size of Vector::View v2.size END