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