wrapind.m

fading 在无线中的应用

function indo = wrapind(indi, siz)
% DESCRIPTION indo = wrapind(indi, siz)
%  Wraps or folds indo back to the range
%  1:size in a cyclic fashion.
%  wrapind([-1 0 1 2 3 4], 3) => [2 3 1 2 3 1]
%  Both input arguments are rounded before usage.
% INPUT 
%  indi -- Any real matrix of any size.
%  siz --  A scalar value not exceeded of the output. It must be >=0.5.
% OUTPUT
%  indo -- the folded version of indo. Has the same size as indi
% TRY
%  wrapind([-1 0 1 2 3 4], 3)
% SEE ALSO
%  mod, floor, round, ceil

% by Magnus Almgren 951104

indo = round(indi) - floor(round(indi-1) ./ round(siz)) .* round(siz);