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context('Test model object trimming')
library(rpart)
library(ipred)
###################################################################
## rpart tests functions
check_rpart_reg <- function() {
skip_on_cran()
set.seed(1)
train_dat <- SLC14_1(100)
train_dat$factor_var <- factor(sample(letters[1:2], nrow(train_dat), replace = TRUE))
test_dat <- SLC14_1(1000)
test_dat$factor_var <- factor(sample(letters[1:2], nrow(test_dat), replace = TRUE))
library(rpart)
rpart_full <- rpart(y ~ ., data = train_dat)
rpart_trim <- caret:::trim(rpart_full)
predict(rpart_full, test_dat) - predict(rpart_trim, test_dat)
}
check_rpart_class <- function() {
skip_on_cran()
set.seed(1)
train_dat <- twoClassSim(100)
train_dat$factor_var <- factor(sample(letters[1:2], nrow(train_dat), replace = TRUE))
test_dat <- twoClassSim(1000)
test_dat$factor_var <- factor(sample(letters[1:2], nrow(test_dat), replace = TRUE))
library(rpart)
rpart_full <- rpart(Class ~ ., data = train_dat)
rpart_trim <- caret:::trim(rpart_full)
predict(rpart_full, test_dat)[, "Class1"] - predict(rpart_trim, test_dat)[, "Class1"]
}
###################################################################
## bagging tests functions
check_bag_reg <- function() {
skip_on_cran()
set.seed(1)
train_dat <- SLC14_1(100)
train_dat$factor_var <- factor(sample(letters[1:2], nrow(train_dat), replace = TRUE))
test_dat <- SLC14_1(1000)
test_dat$factor_var <- factor(sample(letters[1:2], nrow(test_dat), replace = TRUE))
library(rpart)
bag_full <- bagging(y ~ ., data = train_dat)
bag_trim <- caret:::trim(bag_full)
predict(bag_full, test_dat) - predict(bag_trim, test_dat)
}
###################################################################
## Tests
test_that("trimmed rpart regression produces identical predicted values", {
expect_that(sum(check_rpart_reg()), equals(0))
})
test_that("trimmed rpart classification produces identical predicted values", {
expect_that(sum(check_rpart_class()), equals(0))
})
test_that("trimmed bagging regression produces identical predicted values", {
expect_that(sum(check_bag_reg()), equals(0))
})
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