h2o.get_leaderboard: Retrieve the leaderboard from the AutoML instance.

In h2o: R Interface for the 'H2O' Scalable Machine Learning Platform

Retrieve the leaderboard from the AutoML instance.

Description

Contrary to the default leaderboard attached to the automl instance, this one can return columns other than the metrics.

Usage

h2o.get_leaderboard(object, extra_columns = NULL)

Arguments

object

The object for which to return the leaderboard. Currently, only H2OAutoML instances are supported.

extra_columns

A string or a list of string specifying which optional columns should be added to the leaderboard. Defaults to None. Currently supported extensions are: 'ALL': adds all columns below. 'training_time_ms': column providing the training time of each model in milliseconds (doesn't include the training of cross validation models). 'predict_time_per_row_ms': column providing the average prediction time by the model for a single row. 'algo': column providing the algorithm name for each model.

Value

An H2OFrame representing the leaderboard.

Examples

## Not run: 
library(h2o)
h2o.init()
prostate_path <- system.file("extdata", "prostate.csv", package = "h2o")
prostate <- h2o.importFile(path = prostate_path, header = TRUE)
y <- "CAPSULE"
prostate[,y] <- as.factor(prostate[,y])  #convert to factor for classification
aml <- h2o.automl(y = y, training_frame = prostate, max_runtime_secs = 30)
lb <- h2o.get_leaderboard(aml)
head(lb)

## End(Not run)

h2o documentation built on May 29, 2024, 4:26 a.m.