You can use the
Ranks tab to create ranks to
subset the data in your visualizations. A
rank selects either the top (greatest) or the bottom (least) aggregated value for a category.
A rank selects values for a category based on either the frequency of the category
values
or the aggregated value of a measure.
For example, you might create a rank of the top 10 countries by frequency to select
the 10 countries that are most represented
in your
data source. As another example, you might create a rank of the top 10 countries by population
to select the 10 countries with the greatest population.
Note: If the category for the rank
is part of a hierarchy that is used in the current visualization,
then the rank is applied only when the hierarchy is drilled to the
level of the rank category.