Subtables are themselves tabulations nested within a larger tabulation -- hence the prefix 'sub', meaning part of a larger object. Each subtable can be made up of one to four variables (two for row and two for column). Each subtable has one independent variable in the rows and one independent variable in the columns. It may optionally have one dependent variable in the rows and one dependent variable in the columns. In the first example, each subtable has only two variables, one row and one column.
In the second example, there are three variables in each subtable, one row variable plus two column variables (the independent variable Urban/Rural and the dependent variable Sex).
Subtables are created automatically as the user builds the table. Every time an independent variable is dropped onto the rows or columns of the table, new subtables are created as appropriate.
Subtables are designated as part of the larger tabulation using colored outlines when viewing hidden parts. Each subtable has the same properties available to the entire tabulation, i.e., universe, weight, value tallied and unit of tabulation. These properties may be set differently for each subtable within a table.
See Also: Add a Variable to a Tabulation, Using Subtables