diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/matrix/test_matrix.rb | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/matrix/test_matrix.rb b/test/matrix/test_matrix.rb index e2530f7366..a578aeb1c8 100644 --- a/test/matrix/test_matrix.rb +++ b/test/matrix/test_matrix.rb @@ -582,4 +582,30 @@ class TestMatrix < Test::Unit::TestCase assert_equal @e2, @e2.vstack(@e2) assert_equal SubMatrix, SubMatrix.vstack(@e1).class end + + def test_eigenvalues_and_eigenvectors_symmetric + m = Matrix[ + [8, 1], + [1, 8] + ] + values = m.eigensystem.eigenvalues + assert_in_epsilon(7.0, values[0]) + assert_in_epsilon(9.0, values[1]) + vectors = m.eigensystem.eigenvectors + assert_in_epsilon(-vectors[0][0], vectors[0][1]) + assert_in_epsilon(vectors[1][0], vectors[1][1]) + end + + def test_eigenvalues_and_eigenvectors_nonsymmetric + m = Matrix[ + [8, 1], + [4, 5] + ] + values = m.eigensystem.eigenvalues + assert_in_epsilon(9.0, values[0]) + assert_in_epsilon(4.0, values[1]) + vectors = m.eigensystem.eigenvectors + assert_in_epsilon(vectors[0][0], vectors[0][1]) + assert_in_epsilon(-4 * vectors[1][0], vectors[1][1]) + end end |