`dataFrame.column.stat — cumSum()`

Description

The cumSum() method of the stat object returns the cumulative sum of the values in the selected column.

Signature

dataFrame.column(columnName).stat.cumSum()

Scope: column
Family: stat
Returns: array

Argument

columnName (string): The name of the column from which to calculate the cumulative sums.

Returns

mask ( number[] ): An array containing the cumulative sums.

Example

// get cumulative sums from values of a column of the dataFrame
var mask = dataFrame.column('revenue').stat.cumSum();

// add the sums to the dataFrame
dataFrame.column('sum').set(mask);