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package stats_test
// Approximate float comparisons
// Taken from the standard library's math/all_test.go
func tolerance(a, b, e float64) bool {
// Multiplying by e here can underflow denormal values to zero.
// Check a==b so that at least if a and b are small and identical
// we say they match.
if a == b {
return true
}
d := a - b
if d < 0 {
d = -d
}
// note: b is correct (expected) value, a is actual value.
// make error tolerance a fraction of b, not a.
if b != 0 {
e = e * b
if e < 0 {
e = -e
}
}
return d < e
}
func close(a, b float64) bool { return tolerance(a, b, 1e-14) }
func veryclose(a, b float64) bool { return tolerance(a, b, 4e-16) }
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