`dataFrame.column.num — floor()`

Description

The floor() method of the num object returns the values of the selected column rounded down to the specified number of decimal places.

Signature

dataFrame.column(columnName).num.floor(decimals)

Scope: dataFrame
Family: num
Returns: array

Argument

columnName (string): The name of the column containing the values to round.
decimals (number): The number of decimal places to keep.

Returns

mask ( number[] ): An array containing the rounded values.

Example

// round down values from a column of the dataFrame
var mask = dataFrame.column('values').num.ceil(2);

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