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* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
22 lines
723 B
Ruby
22 lines
723 B
Ruby
require File.expand_path('../../../../spec_helper', __FILE__)
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require 'matrix'
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describe "Matrix::EigenvalueDecomposition#eigenvalues" do
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it "returns an array of complex eigenvalues for a rotation matrix" do
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Matrix[[ 1, 1],
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[-1, 1]].eigensystem.eigenvalues.sort_by{|v| v.imag}.should ==
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[ Complex(1, -1), Complex(1, 1)]
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end
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it "returns an array of real eigenvalues for a symetric matrix" do
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Matrix[[1, 2],
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[2, 1]].eigensystem.eigenvalues.sort.map!{|x| x.round(10)}.should ==
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[ -1, 3 ]
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end
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it "returns an array of real eigenvalues for a matrix" do
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Matrix[[14, 16],
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[-6, -6]].eigensystem.eigenvalues.sort.map!{|x| x.round(10)}.should ==
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[ 2, 6 ]
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end
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end
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