Selection Filter

Function Filter
Description	Selects element based on a boolean expression.
Threaded	Yes
Memory Usage	Light
Stream Support	Yes
Added In	-

The Selection Filter is one of the most basic filters in SwiftVis. It pulls items from the first source and preserves all streams in that source. Other sources can be used in the formula, but elements will not be taken from them. That is, the selection will only be applied to Stream 0.

Selections

Basic Usage

The Expression tab is the only operative tab for this filter. To use the filter, you provide a Boolean Expression that is evaluated for every Data Element in Stream 0 of the input. Any Data Element in the input which evaluates the expression as 'true' is then added to the output. Any Data Element that evaluates to false is omitted from the output.

Subset Method