`dataFrame.column.stat — diff()`

Description

The diff() method of the stat object returns an array containing the differences between consecutive values in the selected column.

Signature

dataFrame.column(columnName).stat.diff()

Scope: column
Family: stat
Returns: array

Argument

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

Returns

mask ( number[] ): An array containing the differences between consecutive values.

Example

// get differences between values of a column of the dataFrame
var mask = dataFrame.column('revenue').stat.diff();

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