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[R] Fix softprob reshape. (#7126)

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Jiaming Yuan 2021-07-27 15:25:17 +08:00 committed by GitHub
parent 7ee7a95b84
commit 48d5de80a2
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2 changed files with 16 additions and 1 deletions
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2
R-package/R/xgb.Booster.R
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@ -428,7 +428,7 @@ predict.xgb.Booster <- function(object, newdata, missing = NA, outputmargin = FA
} else if (!reshape && n_groups != 1) {
arr <- ret
} else if (reshape && n_groups != 1) {
arr <- matrix(arr, ncol = 3, byrow = TRUE)
arr <- matrix(arr, ncol = n_groups, byrow = TRUE)
}
arr <- drop(arr)
if (length(dim(arr)) == 1) {

15
R-package/tests/testthat/test_basic.R
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@ -150,6 +150,21 @@ test_that("train and predict softprob", {
mpred1 <- predict(bst, as.matrix(iris[, -5]), reshape = TRUE, iterationrange = c(1, 2))
expect_equal(mpred, mpred1)
d <- cbind(
x1 = rnorm(100),
x2 = rnorm(100),
x3 = rnorm(100)
)
y <- sample.int(10, 100, replace = TRUE) - 1
dtrain <- xgb.DMatrix(data = d, info = list(label = y))
booster <- xgb.train(
params = list(tree_method = "hist"), data = dtrain, nrounds = 4, num_class = 10,
objective = "multi:softprob"
)
predt <- predict(booster, as.matrix(d), reshape = TRUE, strict_shape = FALSE)
expect_equal(ncol(predt), 10)
expect_equal(rowSums(predt), rep(1, 100), tolerance = 1e-7)
})
test_that("train and predict softmax", {