--- /dev/null
+% XPTOPEN read of several file formats and writing of the SAS Transport Format (*.xpt)
+% Supported are ARFF, SAS-XPT and STATA files.
+% XPTOPEN is a mex-file and must be compiled before use.
+% More detailed help can be obtained by the command
+% xptopen
+% without an additional argument
+%
+% X = xptopen(filename)
+% X = xptopen(filename,'r')
+% read file with filename and return variables in struct X
+%
+% X = xptopen(filename,'w',X)
+% save fields of struct X in filename.
+%
+% The fields of X must be column vectors of equal length.
+% Each vector is either a numeric vector or a cell array of strings.
+% The SAS-XPT format stores Date/Time as numeric value counting the number of days since 1960-01-01.
+
+% 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/>.
+
+
+% $Id$
+% Copyright (C) 2010,2011,2012 by Alois Schloegl <alois.schloegl@ist.ac.at>
+% This is part of the NaN-toolbox. For more details see
+% http://pub.ist.ac.at/~schloegl/matlab/NaN/
+
+
+if exist('xptopen','file')~=3
+ error('xptopen.mex is not compiled')
+end;