Nothing
test_secprop <- function() {
x <- c(1, 0, -1, 0)
y <- c(0, 1, 0, -1)
x1 <- -10.000000
y1 <- 10.000000
expect_equal(atan2d(y, x), c(0, 90, 180, -90))
expect_equal(atan2d(y1, x1), 135)
expect_error(atan2d(pi * 3 / 4))
expect_error(atan2d("sq"))
invisible(NULL)
}
test_secprop()
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