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carlism/jruby_array_math.rb

Created October 14, 2009 15:35
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jruby_array_math.rb
require 'java'
require 'jmatharray.jar'
id = org.math.array.LinearAlgebra.identity(4)
ruby_arr = [[0.25, 0.25, 0.25, 0.25],
[0.25, 0.25, 0.25, 0.25],
[0.25, 0.25, 0.25, 0.25],
[0.25, 0.25, 0.25, 0.25]]
java_arr = ruby_arr.to_java Java::double[]
result = org.math.array.LinearAlgebra.plus( java_arr, id )
result.each do |row|
puts row.collect{|i| i.to_s}.join(", ")
end
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