Nothing
test_that("Sample", {
data(cerrado_2classes)
data <- sits_sample(cerrado_2classes, frac = 0.1)
expect_true(nrow(dplyr::filter(data, label == "Cerrado")) == 40)
expect_true(nrow(dplyr::filter(data, label == "Pasture")) == 34)
data2 <- sits_sample(cerrado_2classes, frac = 1.3, oversample = TRUE)
expect_true(nrow(data2) > nrow(cerrado_2classes))
})
test_that("Sample reduce imbalance", {
# print the labels summary for a sample set
sum_ori_samples <- summary(samples_modis_ndvi)
# reduce the sample imbalance
new_samples <- sits_reduce_imbalance(samples_modis_ndvi,
n_samples_over = 200, n_samples_under = 200,
multicores = 2
)
# print the labels summary for the rebalanced set
sum_new_samples <- summary(new_samples)
expect_true(nrow(new_samples) < nrow(samples_modis_ndvi))
expect_true(sd(sum_new_samples[["count"]]) < sd(sum_ori_samples[["count"]]))
})
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