www.gusucode.com > elmat工具箱matlab源码程序 > elmat/flipdim.m
function y = flipdim(x,dim) %FLIPDIM Flip matrix along specified dimension. % FLIPDIM is not recommended. Use FLIP instead. % % FLIPDIM(X,DIM) returns X with dimension DIM flipped. % For example, FLIPDIM(X,1) where % % X = 1 4 produces 3 6 % 2 5 2 5 % 3 6 1 4 % % % Class support for input X: % float: double, single % % See also FLIP, FLIPLR, FLIPUD, ROT90, PERMUTE. % Copyright 1984-2015 The MathWorks, Inc. % Argument parsing if (nargin ~= 2) error(message('MATLAB:flipdim:nargin')); end dim = floor(dim); if (dim <= 0) error(message('MATLAB:flipdim:DimNotPos')); end dimsize = size(x,dim); if (dimsize <= 1) % No-op. y = x; else % Create the index that will transform x. v(1:ndims(x)) = {':'}; % Flip dimension dim. v{dim} = dimsize:-1:1; % Index with v. y = x(v{:}); end