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    Metadata details:
    filename: io_loadspec_twix.m
    path of file: ./repos/osprey/libraries/FID-A/inputOutput
    
    the code of the file until where you have to start completion: %io_loadspec_twix.m
%Jamie Near, McGill University 2014.
%Edits from Franck Lamberton, 2017.
%
% USAGE:
% out=io_loadspec_twix(filename);
%
% DESCRIPTION:
% Reads in siemens twix raw data (.dat file) using the mapVBVD.m and
% twix_map_obj.m functions from Philipp Ehses (philipp.ehses@tuebingen.mpg.de).
%
% op_loadspec_twix outputs the data in structure format, with fields corresponding to time
% scale, fids, frequency scale, spectra, and header fields containing
% information about the acquisit
    
function [out,out_w]=io_loadspec_twix(filename);


%read in the data using the new mapVBVD.  This code has been adapted to
%handle both single RAID files and multi-RAID files.  The vast majority of
%Siemens twix data comes as a single RAID file, but I've encoundered a few
%multi-RAID files, particularly when using VD13D.  The way to distinguish
%them here is that a for a single RAID file, mapVBVD will output a struct,
%whereas for a multi-RAID file, mapVBVD will output a cell array of structs.
%This code assumes that the data of interest is in the last element of the
%cell array (possibly a bad assumption under some circumstances):
twix_obj=mapVBVD(filename);
if isstruct(twix_obj)
    disp('single RAID file detected.');
    RaidLength=1;
elseif iscell(twix_obj)
    disp('multi RAID file detected.');
    RaidLength=length(twix_obj);
    %assume that the data of interest is in the last element of the cell.
    twix_obj=twix_obj{RaidLength};
end