marcandre	2011-07-01 15:10:40 +0900 (Fri, 01 Jul 2011)

  New Revision: 32350

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=32350

  Log:
    * lib/matrix: Add Matrix#round

  Modified files:
    trunk/ChangeLog
    trunk/NEWS
    trunk/lib/matrix.rb

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 32349)
+++ ChangeLog	(revision 32350)
@@ -1,3 +1,7 @@
+Fri Jul  1 15:10:22 2011  Marc-Andre Lafortune  <ruby-core@m...>
+
+	* lib/matrix: Add Matrix#round
+
 Fri Jul  1 11:41:12 2011  NARUSE, Yui  <naruse@r...>
 
 	* string.c (tr_trans): free heap ptr when the str is not embeded.
Index: lib/matrix.rb
===================================================================
--- lib/matrix.rb	(revision 32349)
+++ lib/matrix.rb	(revision 32350)
@@ -89,6 +89,7 @@
 # * <tt> #determinant                   </tt>
 # * <tt> #det                           </tt>
 # * <tt> #rank                          </tt>
+# * <tt> #round                         </tt>
 # * <tt> #trace                         </tt>
 # * <tt> #tr                            </tt>
 # * <tt> #transpose                     </tt>
@@ -1125,6 +1126,12 @@
     rank
   end
 
+  # Returns a matrix with entries rounded to the given precision
+  # (see Float#round)
+  #
+  def round(ndigits=0)
+    map{|e| e.round(ndigits)}
+  end
 
   #
   # Returns the trace (sum of diagonal elements) of the matrix.
Index: NEWS
===================================================================
--- NEWS	(revision 32349)
+++ NEWS	(revision 32350)
@@ -164,6 +164,7 @@
     * Matrix#normal?
     * Matrix#orthogonal?
     * Matrix#permutation?
+    * Matrix#round
     * Matrix#symmetric?
     * Matrix#unitary?
     * Matrix#upper_triangular?

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