%!demo
%! ## `width` counts *variables*, not the underlying columns.  `BloodPressure`
%! ## is a single variable spanning two columns, so the width is 2, not 3.
%!
%! Age = [38; 43; 38; 40; 49];
%! Smoker = logical ([1; 0; 1; 0; 1]);
%! BloodPressure = [124, 93; 109, 77; 125, 83; 117, 75; 122, 80];
%! T = table (Age, Smoker, BloodPressure)
%! width (T)
%!
%! ## Splitting the multi-column variable into scalar columns raises the width.
%! width (splitvars (T))
