%!demo
%! ## For a table `numel` returns rows times variables — the number of table
%! ## *cells* — not the count of underlying data elements.  This 3-by-2 table
%! ## therefore has 6 cells even though `BloodPressure` holds two columns.
%!
%! Age = [38; 43; 40];
%! Smoker = logical ([1; 0; 1]);
%! BloodPressure = [124, 93; 109, 77; 117, 75];
%! T = table (Age, Smoker, BloodPressure)
%! numel (T)
%!
%! ## It is simply the product of `height` and `width`.
%! height (T) * width (T)
