If you have 2014a then you dont have the datastore function, you should upgrade to a newer version if you can. Otherwise, here is how todo it in a loop:
Folder = 'D:\files'; % Your folder with data files
FileList = dir(fullfile(Folder, '*'));
FileList(ismember({FileList.name}, {'.', '..'})) = []; % Remove . and ..
%% Setup the Import Options
opts = delimitedTextImportOptions("NumVariables", 6);
% Specify range and delimiter
opts.DataLines = [1, Inf];
opts.Delimiter = " ";
% Specify column names and types
opts.VariableNames = ["Var1", "Var2", "Var3", "Var4", "Var5", "Var6"];
opts.VariableTypes = ["double", "double", "double", "double", "double", "char"];
opts = setvaropts(opts, 6, "EmptyFieldRule", "auto");
opts.ExtraColumnsRule = "ignore";
opts.EmptyLineRule = "read";
opts.ConsecutiveDelimitersRule = "join";
opts.LeadingDelimitersRule = "ignore";
data = [];
for f = 1:numel(FileList)
file = fullfile(FileList(f).folder,FileList(f).name);
data = cat(1,data,readtable(file, opts));
end
