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Add cofactor and first_minor methods for the Matrix class #568

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add test with a 1xn rectangular matrix

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gogotanaka committed Mar 16, 2014
commit 795393e50785d0ba7314668737b779ebf3cfc972
@@ -248,6 +248,7 @@ def test_minor
def test_first_minor
assert_equal(Matrix.empty(0, 0), Matrix[[1]].first_minor(0, 0))
assert_equal(Matrix.empty(0, 2), Matrix[[1, 4, 2]].first_minor(0, 1))
assert_equal(Matrix[[1, 3]], @m1.first_minor(1, 1))
assert_equal(Matrix[[4, 6]], @m1.first_minor(0, 1))
assert_equal(Matrix[[1, 2]], @m1.first_minor(1, 2))
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