One way of creating three columns from the five columns you imported:
data = randi(99, 10, 5); % Create Data
dstr = sprintf('%d\t%.0f.%.0f\t%.0f.%.0f\n', data'); % Create String From It
[D(:,1),D(:,2),D(:,3)] = strread(dstr); % Read As Numeric
The ‘D’ matrix is the output.