OptiVec: MF_Cols_rotate

MF_Cols_rotate_buf

MD_Cols_rotate_buf

ME_Cols_rotate_buf

MCF_Cols_rotate_buf

MCD_Cols_rotate_buf

MCE_Cols_rotate_buf

Function

efficient column rotation (moving of whole rows), using specified buffer memory

Syntax C/C++	#include <MFstd.h> void MF_Cols_rotate_buf( fMatrix MA, unsigned ht, unsigned len, int pos, fMatrix MBuf );
C++ MatObj	#include <OptiVec.h> void matrix<T>::Cols_rotate_buf( const int pos, const matrix<T> MBuf );
Pascal/Delphi	uses MFstd; procedure MF_Cols_rotate_buf( MA:fMatrix; ht, len:UInt; pos:Integer; MBuf:fMatrix );

Description

MA_i,j = MA_{ht-pos+i, j}, i=0,..,pos-1
MA_i,j = MA_{i-pos, j}, i=pos,...,ht-1

This function is a more efficient variant of MF_Cols_rotate. Instead of internally allocating the necessary work-space, it takes the matrix MBuf as buffer memory. MBuf must be a matrix generated by the OptiVec memory management functions (MF_matrix etc.). The size (i.e., the number of elements, ht*len) of MBuf must be at least the same size as MA.