flipud.sci

小波分解源代码

function y = flipud(x)
//FLIPUD Flip matrix in up/down direction.
//   FLIPUD(X) returns X with columns preserved and rows flipped
//   in the up/down direction.  For example,
//   
//   X = 1 4      becomes  3 6
//       2 5               2 5
//       3 6               1 4
//
//   See also FLIPLR, ROT90, FLIPDIM.
//  Copyright Aldo I Maalouf

if length2(size(x))~=2, error('X must be a 2-D matrix.'); end
[m,n] = size(x);
y = x(m:-1:1,:);
endfunction