Nothing
test_const_cost <- function() {
y <- c(1, 2, 1, -1, 4, 5, 10)
w <- 1 + numeric(length(y))
c1 <- const_cost(y, w, 1, 0, length(y)-1)
out_est <- (sum(y*w) - y*w)/(sum(w) - w)
c2 <- sum(w*(y-out_est)^2)
expect_true(abs(c1-c2)<=1e-5)
invisible(NULL)
}
test_const_cost()
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