`dataFrame.column.compare — isMin()`

Description

The isMin() method of the compare object returns a boolean mask indicating which rows contain the minimum value of the selected column. Multiple matches may be returned when the minimum value appears more than once.

Signature

dataFrame.column(columnName).compare.isMin()

Scope: column
Family: compare
Returns: mask

Argument

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

Returns

mask ( boolean[] )

A boolean mask indicating the rows whose values are equal to the minimum value of the selected column.

Min value: 1
Otherwise: 0

Example

// get the mask of rows where the column 'age' is the min
var mask = df.column('age').compare.isMin();

// set mask to dataFrame
df.column('age_min').set(mask);