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function [ccell,dim] = wavpack2cell(cvec,Lc,varargin)
%-*- texinfo -*-
%@deftypefn {Function} wavpack2cell
%@verbatim
%WAVPACK2CELL Changes wavelet coefficients storing format
% Usage:
% ccell = wavpack2cell(cvec,Lc);
% ccell = wavpack2cell(cvec,Lc,dim);
%
% Input parameters:
% cvec : Coefficients in packed format.
% Lc : Vector containing coefficients lengths.
% dim : Dimension along which the data were transformed.
%
% Output parameters:
% ccell : Coefficients stored in a cell-array. Each element is
% a column vector or a matrix.
% dim : Return used dim. Usefull as an input of the
% complementary function WAVCELL2PACK.
%
% ccell = WAVPACK2CELL(cvec,Lc) copies coefficients from a single column
% vector or columns of a matrix cvec of size [sum(Lc), W] to the cell
% array ccell of length length(Lc). Size of j*-th element of ccell*
% is [Lc(j), W] and it is obtained by:
%
% ccell{j}=cvec(1+sum(Lc(1:j-1)):sum(Lc(1:j),:);
%
% ccell = WAVPACK2CELL(cvec,Lc,dim) allows specifying along which
% dimension the coefficients are stored in cvec. dim==1 (default)
% considers columns (as above) and dim==2 rows to be coefficients
% belonging to separate channels. Other values are not supported. For
% dim=2, cvec size is [W, sum(Lc)], Size of j*-th element of ccell*
% is [Lc(j), W] and it is obtained by:
%
% ccell{j}=cvec(:,1+sum(Lc(1:j-1)):sum(Lc(1:j)).';
%
%@end verbatim
%@strong{Url}: @url{http://ltfat.github.io/doc/wavelets/wavpack2cell.html}
%@seealso{wavcell2pack, fwt, wfbt, wpfbt}
%@end deftypefn
% Copyright (C) 2005-2016 Peter L. Soendergaard <peter@sonderport.dk>.
% This file is part of LTFAT version 2.3.1
%
% 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/>.
% AUTHOR: Zdenek Prusa
if(nargin<2)
error('%s: Too few input parameters.',upper(mfilename));
end
if(~isnumeric(cvec))
error('%s: *cvec* is not a numeric array.',upper(mfilename));
end
definput.keyvals.dim = [];
[flags,kv,dim]=ltfatarghelper({'dim'},definput,varargin);
%If dim is not specified use first non-singleton dimension.
if(isempty(dim))
dim=find(size(cvec)>1,1);
end
if(dim>2)
error('%s: Multidimensional data is not accepted.',upper(mfilename));
end
if(dim==2)
cvec = cvec.';
end
if(sum(Lc)~=size(cvec,1))
error('%s: Sum of elements of Lc is not equal to vector length along dimension %d. Possibly wrong dim?',upper(mfilename),dim);
end
% Actual computation
ccell = mat2cell(cvec,Lc);
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