h2o.getGrid: Get a grid object from H2O distributed K/V store.

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

Get a grid object from H2O distributed K/V store.

Description

Note that if neither cross-validation nor a validation frame is used in the grid search, then the training metrics will display in the "get grid" output. If a validation frame is passed to the grid, and nfolds = 0, then the validation metrics will display. However, if nfolds > 1, then cross-validation metrics will display even if a validation frame is provided.

Usage

h2o.getGrid(grid_id, sort_by, decreasing, verbose = FALSE)

Arguments

grid_id	ID of existing grid object to fetch
sort_by	Sort the models in the grid space by a metric. Choices are "logloss", "residual_deviance", "mse", "auc", "accuracy", "precision", "recall", "f1", etc.
decreasing	Specify whether sort order should be decreasing
verbose	Controls verbosity of the output, if enabled prints out error messages for failed models (default: FALSE)

Examples

## Not run: 
library(h2o)
library(jsonlite)
h2o.init()
iris_hf <- as.h2o(iris)
h2o.grid("gbm", grid_id = "gbm_grid_id", x = c(1:4), y = 5,
         training_frame = iris_hf, hyper_params = list(ntrees = c(1, 2, 3)))
grid <- h2o.getGrid("gbm_grid_id")
# Get grid summary
summary(grid)
# Fetch grid models
model_ids <- grid@model_ids
models <- lapply(model_ids, function(id) { h2o.getModel(id)})

## End(Not run)

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