Restrict the Cases You See by Filtering Data

How To... > Work with Collections > Restrict the Cases You See by Filtering Data

At times, you want to see only a subset of the cases in a collection. For example, if you are exploring incomes, you might want to filter out the children and retired people. In Fathom, a filter serves this purpose. A filter is an expression that results in true or false for each case, a Boolean expression. See Make Boolean Expressions. Cases for which the value of the expression is true pass through the filter and are visible in graphs and other objects. Cases for which the value is false do not; they appear grayed out in an open collection and are not shown in other objects.

If you want the filter to apply to one object only, add the filter to that object; if you want it to apply to all objects, add the filter to the collection.

See also

Add a Filter

Delete Cases