For example, a data set which has the variables @var{height}, @var{weight}, and
@var{name}, might have the observations:
@example
-188 89 Ahmed
-119 107 Frank
-123 67 Julie
+1881 89.2 Ahmed
+1192 107.01 Frank
+1230 67 Julie
@end example
@noindent
The following sections explain how to define a dataset.