Determine if file contains data of an sqw-type object or dnd-type sqw object
>> [sqw_type, ndims, data_source, mess] = is_sqw_type_file(sqw, infile)
Input:
--------
w Dummy sqw object, whose sole purpose is to get to this function
infile File name, character array of file names, or cellstr of file names
Output:
--------
sqw_type =true if sqw-type contents; =false if dnd-type contents (array)
ndims Number of dimensions (array if more than one file)
filename Cell array of file names (even if only one file, this is still a cell array)
mess Error message; blank if no errors, non-blank otherwise
% Overloaded methods:
sqw/is_sqw_type_file
sqw/is_sqw_type_file