str2 (MyArray, ntokens, format, just)

%function str2
%
%This function will convert each element in a cell array to a string and
%outputs the result as a 2D character array.
%
%syntax:
%     s = str2 (MyArray, ntokens, format, just)
%
%With:
%     Myarray: array to be formatted as a character array
%     ntokens: double vector: each element tells how many characters the
%         values in a column of the array will have.
%

%This software package is dual licensed. You can use it according to the terms
%of either the GPLv3 or the BSD license.
%
%C 2004-2008, Kris De Gussem, Raman Spectroscopy Research Group, Department
%of analytical chemistry, Ghent University
%C2009 Kris De Gussem
%
%This file is part of GSTools.
%
%GSTools 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.
%
%GSTools 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 GSTools.  If not, see <http://www.gnu.org/licenses/>.

%Copyright (c) 2004-2009, Kris De Gussem
%All rights reserved.
%
%Redistribution and use in source and binary forms, with or without 
%modification, are permitted provided that the following conditions are 
%met:
%
%    * Redistributions of source code must retain the above copyright 
%      notice, this list of conditions and the following disclaimer.
%    * Redistributions in binary form must reproduce the above copyright 
%      notice, this list of conditions and the following disclaimer in 
%      the documentation and/or other materials provided with the distribution
%    * Neither the name of Raman Spectroscopy Research Group, Department of
%	  analytical chemistry, Ghent University nor the names 
%      of its contributors may be used to endorse or promote products derived 
%      from this software without specific prior written permission.
%      
%THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
%AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
%IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
%ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
%LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
%CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
%SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
%INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
%CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
%ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
%POSSIBILITY OF SUCH DAMAGE.

function s = str2 (MyArray, ntokens, format, just)
switch nargin
    case 2
        format = [];
        just = [];
    case 3
        just = [];
    case 4
    otherwise
        error ('GSTools:msg', 'Wrong number of input parameters.');
end

[n,m]=size(MyArray);

if numel(ntokens) == 1
   ntokens = ntokens(ones(m,1));
end

s=repmat(' ', n, sum(ntokens));
be = 1;

for i=1:m
    tmp=str(MyArray(:,i), 1, format, ntokens(i), just);
    tmp = char(tmp);
    s(:,be:be+ntokens(i)-1) = tmp;
    be = be + ntokens(i);
end