From 9b5675b325c9d4533e4f3db080cd2aa019068aad Mon Sep 17 00:00:00 2001
From: Marc-Andre Lafortune <github@marc-andre.ca>
Date: Thu, 30 Apr 2020 18:04:30 -0400
Subject: [ruby/matrix] Add Matrix#adjoint [#14]

Patch adapted from Alessandro Minali
---
 lib/matrix.rb | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'lib')

diff --git a/lib/matrix.rb b/lib/matrix.rb
index 75b5da29c7..336a92877b 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -1532,6 +1532,17 @@ class Matrix
   end
   alias_method :conj, :conjugate
 
+  #
+  # Returns the adjoint of the matrix.
+  #
+  #   Matrix[ [i,1],[2,-i] ].adjoint
+  #   #  => -i 2
+  #   #      1 i
+  #
+  def adjoint
+    conjugate.transpose
+  end
+
   #
   # Returns the imaginary part of the matrix.
   #   Matrix[[Complex(1,2), Complex(0,1), 0], [1, 2, 3]]
-- 
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