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context('mnLogLoss')
classes <- LETTERS[1:3]
test_dat1 <- data.frame(obs = c("A", "A", "A", "B", "B", "C"),
pred = c("A", "A", "A", "B", "B", "C"),
A = c(1, .80, .51, .1, .2, .3),
B = c(0, .05, .29, .8, .6, .3),
C = c(0, .15, .20, .1, .2, .4),
stringsAsFactors = TRUE)
test_that("Multiclass logloss returns expected values", {
result1 <- mnLogLoss(test_dat1, classes)
test_dat2 <- test_dat1
test_dat2$A[1] <- NA
result2 <- mnLogLoss(test_dat2, classes)
test_dat3 <- test_dat1
test_dat3 <- test_dat3[, rev(1:5)]
result3 <- mnLogLoss(test_dat3, classes)
expect_equal(result1, c(logLoss = 0.424458), tolerance = .000001)
expect_equal(result2, c(logLoss = 0.5093496), tolerance = .000001)
expect_equal(result3, c(logLoss = 0.424458), tolerance = .000001)
})
# Issue #637
classes.b <- c("A", "B")
test_dat1.b <- data.frame(obs = c("A", "A", "A", "B", "B"),
pred = c("A", "A", "A", "B", "B"),
A = c(1, .80, .51, .1, .2),
B = c(0, .20, .49, .9, .8),
stringsAsFactors = TRUE)
test_that("Twoclass logloss returns expected values", {
result1 <- mnLogLoss(test_dat1.b, classes.b)
test_dat2.b <- test_dat1.b
test_dat2.b$A[1] <- NA
result2 <- mnLogLoss(test_dat2.b, classes.b)
test_dat3.b <- test_dat1.b
test_dat3.b <- test_dat3.b[, rev(1:4)]
result3 <- mnLogLoss(test_dat3.b, classes.b)
expect_equal(result1, c(logLoss = 0.244998), tolerance = .000001)
expect_equal(result2, c(logLoss = 0.306248), tolerance = .000001)
expect_equal(result3, c(logLoss = 0.244998), tolerance = .000001)
})
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