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19 lines
466 B
Ruby
19 lines
466 B
Ruby
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require File.expand_path('../../../../spec_helper', __FILE__)
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require 'matrix'
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describe "Matrix::EigenvalueDecomposition#to_a" do
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before :each do
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@a = Matrix[[14, 16], [-6, -6]]
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@e = Matrix::EigenvalueDecomposition.new(@a)
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end
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it "returns an array of with [V, D, V.inv]" do
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@e.to_a.should == [@e.v, @e.d, @e.v_inv]
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end
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it "returns a factorization" do
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v, d, v_inv = @e.to_a
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(v * d * v_inv).map{|e| e.round(10)}.should == @a
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end
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end
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