www.gusucode.com > elmat工具箱matlab源码程序 > elmat/circshift.m
%CIRCSHIFT Shift positions of elements circularly. % Y = CIRCSHIFT(X,K) where K is an integer scalar circularly shifts % the elements in the array X by K positions. If X is a vector and K is % positive, then the values of X are circularly shifted from the beginning % to the end. If K is negative, they are shifted from the end to the % beginning. If X is a matrix, CIRCSHIFT shifts along columns. If X is an % N-D array, CIRCSHIFT shifts along the first nonsingleton dimension. % % Y = CIRCSHIFT(X,K,DIM) circularly shifts along the dimension DIM. % % Y = CIRCSHIFT(X,V) circularly shifts the values in the array X % by V elements. V is a vector of integers where the N-th element % specifies the shift amount along the N-th dimension of % array X. % % Examples: % A = [ 1 2 3; 4 5 6; 7 8 9]; % B = circshift(A,1) % circularly shifts first dimension values down by 1. % B = 7 8 9 % 1 2 3 % 4 5 6 % B = circshift(A,[1 -1]) % circularly shifts first dimension values % % down by 1 and second dimension left by 1. % B = 8 9 7 % 2 3 1 % 5 6 4 % % See also FFTSHIFT, SHIFTDIM, PERMUTE. % Copyright 1984-2015 The MathWorks, Inc.