Model Performance Metrics in H2O

Source: R/models.R

Given a trained h2o model, compute its performance on the given dataset. However, if the dataset does not contain the response/target column, no performance will be returned. Instead, a warning message will be printed.

h2o.performance(
  model,
  newdata = NULL,
  train = FALSE,
  valid = FALSE,
  xval = FALSE,
  data = NULL
)

Arguments

model

An H2OModel object
newdata

An H2OFrame. The model will make predictions on this dataset, and subsequently score them. The dataset should match the dataset that was used to train the model, in terms of column names, types, and dimensions. If newdata is passed in, then train, valid, and xval are ignored.
train

A logical value indicating whether to return the training metrics (constructed during training).

Note: when the trained h2o model uses balance_classes, the training metrics constructed during training will be from the balanced training dataset. For more information visit: https://0xdata.atlassian.net/browse/TN-9
valid

A logical value indicating whether to return the validation metrics (constructed during training).
xval

A logical value indicating whether to return the cross-validation metrics (constructed during training).
data

(DEPRECATED) An H2OFrame. This argument is now called `newdata`.

Value

Returns an object of the H2OModelMetrics subclass.

Examples

if (FALSE) {
library(h2o)
h2o.init()
prostate_path <- system.file("extdata", "prostate.csv", package = "h2o")
prostate <- h2o.uploadFile(path = prostate_path)
prostate$CAPSULE <- as.factor(prostate$CAPSULE)
prostate_gbm <- h2o.gbm(3:9, "CAPSULE", prostate)
h2o.performance(model = prostate_gbm, newdata=prostate)

## If model uses balance_classes
## the results from train = TRUE will not match the results from newdata = prostate
prostate_gbm_balanced <- h2o.gbm(3:9, "CAPSULE", prostate, balance_classes = TRUE)
h2o.performance(model = prostate_gbm_balanced, newdata = prostate)
h2o.performance(model = prostate_gbm_balanced, train = TRUE)
}