Count unique¶

Counts the number of unique elements in each list/array of the input column.

Usage¶

The following are the step's expected inputs and outputs and their specific types.

Step signature

count_unique(input: list) -> (output: number)

where the object {"param": value} is optional in most cases and if present may contain any of the parameters described in the corresponding section below.

Example¶

This step has no configuration parameters, so it's simply:

Example call (in recipe editor)

count_unique(ds.input_lists) -> (ds.n_unique)

Inputs¶

input: column:list

A column containing lists.

Outputs¶

output: column:number

The count of unique elements for each input list.