`dataFrame.column.missing — count()`

Description

The count() method of the missing object returns the number of missing values in the selected column.

Signature

dataFrame.column(columnName).missing.count()

Scope: dataFrame
Family: missing
Returns: number

Argument

columnName (string): The name of the column from which to count values.

Returns

count (number): The number of missing values in the selected column.

Example

// log the count of missing values in the 'revenue' column
var count = dataFrame.column('revenu').missing.count();

// log the count
notebook.log(count);