1 ## Copyright (C) 2008 Sylvain Pelissier <sylvain.pelissier@gmail.com>
3 ## This program is free software; you can redistribute it and/or modify it under
4 ## the terms of the GNU General Public License as published by the Free Software
5 ## Foundation; either version 3 of the License, or (at your option) any later
8 ## This program is distributed in the hope that it will be useful, but WITHOUT
9 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
13 ## You should have received a copy of the GNU General Public License along with
14 ## this program; if not, see <http://www.gnu.org/licenses/>.
17 ## @deftypefn {Function File} {@var{intrlvd} =} intrlv (@var{data}, @var{elements})
18 ## Interleaved elements of @var{data} according to @var{elements}.
22 function intrlvd = intrlv(data,elements)
23 if(nargin < 2 || nargin >2)
24 error('usage : interlvd = interlv(data,elements)');
27 if(~isvector(elements))
28 error("Elements must be a vector");
32 if(length(elements) ~= length(data) || any(sort(elements) ~= 1:length(data)))
33 error("elements must be a permutation of data indices");
35 intrlvd = data(elements);
37 if(length(elements) ~= size(data,1) || any(sort(elements) ~= 1:size(data,1)))
38 error("elements must be a permutation of data indices");
40 intrlvd = data(elements,:);