is_missing

This step checks each row of the input column to determine if the value is missing (null or NaN). The result is a new boolean column, where each row indicates whether the corresponding element in the input column is missing.

The step can work with single-valued and multi-valued columns, and the output can be configured to be either boolean (true/false), numeric (0/1) or categorical (custom labels).

• For single-valued columns: Each row in the output column will be true if the corresponding value in the input column is missing, and false otherwise.
• For multivalued columns: Each row in the output column will be true if the corresponding sub-list in the input column is empty, and false otherwise.

is_missing(column: column, {
    "param": value,
    ...
}) -> (result: column)