Nothing
context("db")
test_that("db", {
data<-matrix(c(1,1,5,7,3,3.5,4,1,1.5,2,2,3,3.5,4),7,2)
clusters<-c(1,1,2,2,3,3,3)
expect_equal(round(index.DB(data,clusters)$DB,4),0.4431)
})
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