From 655cb34f17c2dc4b84aaf3fa99cceabb830138b8 Mon Sep 17 00:00:00 2001 From: nobu Date: Sat, 9 Jan 2010 20:35:28 +0000 Subject: * lib/matrix.rb (Matrix#inverse_from): use #quo. backported r9490. * lib/matrix.rb (Matrix#determinant): ditto. [ruby-core:27507] * lib/matrix.rb (Matrix#rank): ditto. * lib/matrix.rb (Matrix::Scalar#initialize): ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26263 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- test/matrix/test_matrix.rb | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'test/matrix') diff --git a/test/matrix/test_matrix.rb b/test/matrix/test_matrix.rb index 8e0848de01..6b9b587c6d 100644 --- a/test/matrix/test_matrix.rb +++ b/test/matrix/test_matrix.rb @@ -144,4 +144,13 @@ class TestMatrix < Test::Unit::TestCase assert_equal 3, m.transpose.rank end end + + def test_inverse + assert_equal(Matrix[[-1, 1], [0, -1]], Matrix[[-1, -1], [0, -1]].inverse) + end + + def test_determinant + assert_equal(45, Matrix[[7,6], [3,9]].determinant) + assert_equal(-18, Matrix[[2,0,1],[0,-2,2],[1,2,3]].determinant) + end end -- cgit v1.2.3