dataFrame.column.stat — reduceCategories()

The reduceCategories() method of the stat object returns a category mask in which infrequent categories are grouped into a single category.

dataFrame.column(columnName).stat.reduceCategories({ groupLabel: 'Other', coverage: 0.9, minCount: 2 })

Scope

column

Family

stat

Returns

mask

columnName (string)

The name of the column from which to compute the coefficient of variation.

options (object)

Category reduction options.

groupLabel (string)

The label assigned to grouped categories. (Default: Other.)

coverage (number)

The minimum cumulative frequency coverage to preserve before grouping remaining categories. (Default: 0.9.)

minCount (number)

The minimum frequency required for a category to be preserved. (Default: 2.)

mask (array)

An array containing the reduced category assigned to each value.

// reduce the category of the values of a column of the dataFrame
var mask = dataFrame.column('revenue').stat.reduceCategories();

// add the new categorical values into the dataFrame
dataFrame.column('newValues').set(mask);