Approximate Distinct Count Of
Highly accurate approximation techniques are used to provide an estimate of the unique values of a set one or more attributes. Unlike Distinct Count, this feature does not require an Identifier to be used in the attribute selection and thus can be applied to a much wider range of use-cases.
Note
Unlike the Distinct Count Of feature, Approximate Distinct Count Of allows the use of any attribute and is not restricted to Identifier or Subject attributes.
For Example:
- Number times this user agent, OS etc has been seen in the last 2 weeks
Configuration
-
Feature Name
The "dictionary" name under which the feature value will be stored. -
Selects which attribute(s) to measure the unique value/combination(s) of
Optional Configuration
- Default Value
A value that can be assigned to the feature if the attributes to calculate the features are not present. - Scope
Can be used to extend the event search from the local node, to all nodes within the same organization all the way to all across customers (global). - Time Window
Can be used to limit the Feature calculation to a specific time period/window. e.g 1 week.
Implementing In The Feature Editor
- name: cntx_os_usragn_2wk
default_value: 0
time_window:
weeks: 2
find_the:
approx_distinct_count_of:
attributes:
- profiling.device.user_agent
event_type: all
with_scope: same_node_instance