# Exits
if (!requireNamespace("h2o", quietly = TRUE)) {
exit_file("Package h2o missing")
}
if (length(unclass(packageVersion("vip"))[[1L]]) == 3) {
exit_file("Skip h2o tests for CRAN releases")
}
# Load required packages
suppressMessages({
library(h2o)
})
# Generate Friedman benchmark data
friedman1 <- gen_friedman(seed = 101)
friedman2 <- gen_friedman(seed = 101, n_bins = 2)
friedman3 <- gen_friedman(seed = 101, n_bins = 3)
# Initialize connection to H2O
h2o.init()
h2o.no_progress()
# Fit model(s)
fit1 <- h2o.glm( # regression
x = paste0("x", 1L:10L),
y = "y",
training_frame = as.h2o(friedman1)
)
fit2 <- h2o.glm( # binary classification
x = paste0("x", 1L:10L),
y = "y",
training_frame = as.h2o(friedman2),
family = "binomial"
)
fit3 <- h2o.glm( # multiclass classification
x = paste0("x", 1L:10L),
y = "y",
training_frame = as.h2o(friedman3),
family = "multinomial"
)
# Compute VI scores
vis1 <- vi_model(fit1)
vis2 <- vi_model(fit2)
vis3 <- vi_model(fit3)
# Expectations for `vi_model()`
expect_identical(
current = vis1$Importance,
target = h2o.varimp(fit1)$relative_importance
)
expect_identical(
current = vis2$Importance,
target = h2o.varimp(fit2)$relative_importance
)
expect_identical(
current = vis3$Importance,
target = h2o.varimp(fit3)$relative_importance
)
# FIXME: Why not identical? Conversion issues?
# Expectations for `get_training_data()`
expect_equal(
current = vip:::get_training_data.H2ORegressionModel(fit1),
target = friedman1
)
expect_equal(
current = vip:::get_training_data.H2OBinomialModel(fit2),
target = friedman2
)
expect_equal(
current = vip:::get_training_data.H2OMultinomialModel(fit3),
target = friedman3
)
# Expectations for `get_feature_names()`
expect_identical(
current = vip:::get_feature_names.H2ORegressionModel(fit1),
target = paste0("x", 1L:10L)
)
expect_identical(
current = vip:::get_feature_names.H2OBinomialModel(fit2),
target = paste0("x", 1L:10L)
)
expect_identical(
current = vip:::get_feature_names.H2OMultinomialModel(fit3),
target = paste0("x", 1L:10L)
)
# Call `vip::vip()` directly
p <- vip(fit1, method = "model", include_type = TRUE,
mapping = ggplot2::aes(fill = Sign))
# Expect `p` to be a `"gg" "ggplot"` object
expect_identical(
current = class(p),
target = c("gg", "ggplot")
)
# Display VIPs side by side
grid.arrange(
vip(vis1, include_type = TRUE),
vip(vis2, include_type = TRUE),
vip(vis3, include_type = TRUE),
p,
nrow = 1
)
# Shutdown H2O connection
h2o.shutdown(prompt = FALSE)
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