% Read a collection of sqw files with a common grid and write to a single sqw file.
% Currently the input files are restricted to have been made from a single spe file.
%
%   >> write_nsqw_to_sqw (dummy, infiles, outfile)
%
% Input:
%   dummy           Dummy sqw object  - used only to ensure that this service routine was called
%   infiles         Cell array or character array of file name(s) of input file(s)
%   outfile         Full name of output file
%
%%   Overloaded methods:
%      sqw/write_nsqw_to_sqw
%      sqw/write_nsqw_to_sqw
%