2b5b96d760
* [R] xgb.save must work when handle in nil but raw exists * [R] print.xgb.Booster should still print other info when handle is nil * [R] rename internal function xgb.Booster to xgb.Booster.handle to make its intent clear * [R] rename xgb.Booster.check to xgb.Booster.complete and make it visible; more docs * [R] storing evaluation_log should depend only on watchlist, not on verbose * [R] reduce the excessive chattiness of unit tests * [R] only disable some tests in windows when it's not 64-bit * [R] clean-up xgb.DMatrix * [R] test xgb.DMatrix loading from libsvm text file * [R] store feature_names in xgb.Booster, use them from utility functions * [R] remove non-functional co-occurence computation from xgb.importance * [R] verbose=0 is enough without a callback * [R] added forgotten xgb.Booster.complete.Rd; cran check fixes * [R] update installation instructions
88 lines
2.8 KiB
R
88 lines
2.8 KiB
R
require(xgboost)
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require(Matrix)
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context("testing xgb.DMatrix functionality")
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data(agaricus.test, package='xgboost')
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test_data <- agaricus.test$data[1:100,]
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test_label <- agaricus.test$label[1:100]
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test_that("xgb.DMatrix: basic construction, saving, loading", {
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# from sparse matrix
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dtest1 <- xgb.DMatrix(test_data, label=test_label)
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# from dense matrix
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dtest2 <- xgb.DMatrix(as.matrix(test_data), label=test_label)
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expect_equal(getinfo(dtest1, 'label'), getinfo(dtest2, 'label'))
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# save to a local file
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tmp_file <- tempfile('xgb.DMatrix_')
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expect_true(xgb.DMatrix.save(dtest1, tmp_file))
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# read from a local file
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dtest3 <- xgb.DMatrix(tmp_file)
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unlink(tmp_file)
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expect_equal(getinfo(dtest1, 'label'), getinfo(dtest3, 'label'))
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# from a libsvm text file
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tmp <- c("0 1:1 2:1","1 3:1","0 1:1")
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tmp_file <- 'tmp.libsvm'
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writeLines(tmp, tmp_file)
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dtest4 <- xgb.DMatrix(tmp_file)
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expect_equal(dim(dtest4), c(3, 4))
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expect_equal(getinfo(dtest4, 'label'), c(0,1,0))
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unlink(tmp_file)
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})
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test_that("xgb.DMatrix: getinfo & setinfo", {
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dtest <- xgb.DMatrix(test_data)
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expect_true(setinfo(dtest, 'label', test_label))
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labels <- getinfo(dtest, 'label')
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expect_equal(test_label, getinfo(dtest, 'label'))
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expect_true(length(getinfo(dtest, 'weight')) == 0)
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expect_true(length(getinfo(dtest, 'base_margin')) == 0)
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expect_true(setinfo(dtest, 'weight', test_label))
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expect_true(setinfo(dtest, 'base_margin', test_label))
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expect_true(setinfo(dtest, 'group', c(50,50)))
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expect_error(setinfo(dtest, 'group', test_label))
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# providing character values will give a warning
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expect_warning( setinfo(dtest, 'weight', rep('a', nrow(test_data))) )
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# any other label should error
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expect_error(setinfo(dtest, 'asdf', test_label))
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})
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test_that("xgb.DMatrix: slice, dim", {
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dtest <- xgb.DMatrix(test_data, label=test_label)
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expect_equal(dim(dtest), dim(test_data))
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dsub1 <- slice(dtest, 1:42)
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expect_equal(nrow(dsub1), 42)
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expect_equal(ncol(dsub1), ncol(test_data))
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dsub2 <- dtest[1:42,]
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expect_equal(dim(dtest), dim(test_data))
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expect_equal(getinfo(dsub1, 'label'), getinfo(dsub2, 'label'))
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})
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test_that("xgb.DMatrix: colnames", {
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dtest <- xgb.DMatrix(test_data, label=test_label)
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expect_equal(colnames(dtest), colnames(test_data))
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expect_error( colnames(dtest) <- 'asdf')
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new_names <- make.names(1:ncol(test_data))
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expect_silent( colnames(dtest) <- new_names)
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expect_equal(colnames(dtest), new_names)
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expect_silent(colnames(dtest) <- NULL)
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expect_null(colnames(dtest))
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})
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test_that("xgb.DMatrix: nrow is correct for a very sparse matrix", {
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set.seed(123)
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nr <- 1000
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x <- rsparsematrix(nr, 100, density=0.0005)
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# we want it very sparse, so that last rows are empty
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expect_lt(max(x@i), nr)
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dtest <- xgb.DMatrix(x)
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expect_equal(dim(dtest), dim(x))
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})
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