R: Aggregation object.

Aggregation {mlr} | R Documentation

## Aggregation object.

### Description

An aggregation method reduces the performance values of the test (and possibly the training sets) to a single value. To see all possible implemented aggregations look at aggregations.

The aggregation can access all relevant information of the result after resampling and combine them into a single value. Though usually something very simple like taking the mean of the test set performances is done.

Object members:

id (`character(1)`)

  Name of the aggregation method.

name (`character(1)`)

  Long name of the aggregation method.

properties (character)

  Properties of the aggregation.

fun ('function(task, perf.test, perf.train, measure, group, pred)])

  Aggregation function.

### See Also

makeAggregation

[Package mlr version 2.15.0 Index]