I tr

I tried once to use your *.mat files and I get the same error because it can't read the files correctly because of the variable definition. The easiest way is to convert the mat files to txt. files.

Code*****

files = dir('*.mat') ;   % you are in the folder of files 
N = length(files) ;
% loop for each file 
for i = 1:N
    thisfile = files(i).name ;
    Data = load(thisfile);
    DataField = fieldnames(Data);
    thisfile=strcat(thisfile(1:end-4) , '.txt')
    dlmwrite(thisfile, Data.(DataField{1}),'delimiter','\t');
end