Changeset 2917 in Sophya for trunk/SophyaLib/TArray/tmatrix.cc

Timestamp:

Feb 23, 2006, 2:50:26 PM (20 years ago)

Author:

ansari

Message:

Documentation + debug Range et extraction sous-tableaux , Reza 23/02/2006

File:

• trunk/SophyaLib/TArray/tmatrix.cc (modified) (3 diffs)

trunk/SophyaLib/TArray/tmatrix.cc

@@ -1 @@
-// $Id: tmatrix.cc,v 1.34 2006-02-22 18:17:30 ansari Exp $
+// $Id: tmatrix.cc,v 1.35 2006-02-23 13:50:26 ansari Exp $
 //                         C.Magneville          04/99
 #include "sopnamsp.h"
@@ -17 +17 @@
   two dimensional arrays as matrices. Matrix and vector operations,
   such as matrix multiplication or transposition is implemented.
+
+  Sub-matrices, in particular matrix rows and columns can easily and 
+  efficiently be extracted and manipulated.
+  It should be noted that a significant memory overhead is associated with
+  small matrices (typically less than 10x10=100 elements).However, 
+  higher dimension arrays (3D for examples) can be used to represent large 
+  number of small matrices or vectors.
+
   \b Matrix is a typedef for double precision floating point matrix ( TMatrix<r_8> ).
 
   \sa SOPHYA::TArray  SOPHYA::TVector
-  \sa SOPHYA::Range  \sa SOPHYA::Sequence
-  \sa SOPHYA::MathArray  \sa SOPHYA::SimpleMatrixOperation
+  \sa SOPHYA::Range   SOPHYA::Sequence
+  \sa SOPHYA::MathArray  SOPHYA::SimpleMatrixOperation
 
   The following sample code illustrates vector-matrix multiplication 
@@ -254 +262 @@
   if (mm == CMemoryMapping)  { rx = rcol;  ry = rline; }
   else { ry = rcol;  rx = rline; }
-  TMatrix sm(SubArray(rx, ry, Range::first(), Range::first(), Range::first()), true);
+  TMatrix sm(SubArray(rx, ry, Range::first(), Range::first(), Range::first(), false), true);
   sm.UpdateMemoryMapping(mm);
   return(sm);