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iCAPs/packages/gspbox/utils/gsp_repmatline.m
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gsp_repmatline.m
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function [ Ar ] = gsp_repmatline( A,ncol,nrow )
%GSP_REPMATLINE This function repeat the matrix A in a specific manner
% Usage Ar = gsp_repmatline( A,ncol,nrow );
%
% Inputs parameters
% A : Matrix
% ncol: Integer
% nrow: Integer
% Outputs parameters
% Ar : Matrix
%
% This function repeat a matrix line by line and column by column
%
% For ncol=1 and nrow=2, the matix
% 1 2
% 3 4
% becomes
% 1 1 2 2
% 3 3 4 4
%
%
% Url: http://lts2research.epfl.ch/gsp/doc/utils/gsp_repmatline.php
% Copyright (C) 2013-2016 Nathanael Perraudin, Johan Paratte, David I Shuman.
% This file is part of GSPbox version 0.7.0
%
% 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/>.
% If you use this toolbox please kindly cite
% N. Perraudin, J. Paratte, D. Shuman, V. Kalofolias, P. Vandergheynst,
% and D. K. Hammond. GSPBOX: A toolbox for signal processing on graphs.
% ArXiv e-prints, Aug. 2014.
% http://arxiv.org/abs/1408.5781
% Author: Nathanael Perraudin
% Date : 23 October 2013
if ~floor(ncol)==ncol || ~floor(nrow)==nrow
error('The number of lines and rows must be integer');
end
if ncol<1 || nrow<1
error('The number of lines and rows must be greater or equal to one')
end
% Initialisation
Ar=A;
if ncol>1
[row, col] = size(Ar);
Ar = Ar(:);
Ar = Ar(:,ones(1,ncol)).';
Ar = reshape(Ar,ncol*row,col);
end
if nrow>1
Ar=transpose(Ar);
[col, row] = size(Ar);
Ar = Ar(:);
Ar = Ar(:,ones(1,nrow)).';
Ar = reshape(Ar,nrow*col,row);
Ar=transpose(Ar);
end
end
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