circbitflip.m

Matlab时频分析工具箱,希望能对大家有所帮助啊

function bitorder=circbitflip(order)
%CIRCBITFLIP  Compute sequence of numbers by flipping one bit.
%   Usage: bitorder=circbitflip(order)
%
%   CIRCBITFLIP(order) computes a sequence of numbers from 0 until
%   order-1 such that each number differs from the previous one by
%   a single flipped bits.

% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
% 
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
% 
% You should have received a copy of the GNU General Public License
% along with this program.  If not, see <http://www.gnu.org/licenses/>.

bitorder=[0;1];

if order==2
  return;
end;

for thisorder=2:log2(order)
  bitorder=[bitorder;...
	    2^(thisorder-1)+flipud(bitorder)];
end;