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Luke I. Wilson
2023-05-17 12:02:16 -05:00
parent 8fcd7f5cc9
commit ef9659b450
6 changed files with 136 additions and 26 deletions
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5
utils.go
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@@ -9,6 +9,11 @@ import (
const floatComparisonTolerance = float64(1e-6)
// Crossover returns true if the latest a value crosses above the latest b value, but only if it just happened. For example, if a series is [1, 2, 3, 4, 5] and b series is [1, 2, 3, 4, 3], then Crossover(a, b) returns false because the latest a value is 5 and the latest b value is 3. However, if a series is [1, 2, 3, 4, 5] and b series is [1, 2, 3, 4, 6], then Crossover(a, b) returns true because the latest a value is 5 and the latest b value is 6
func Crossover(a, b Series) bool {
return a.Float(-1) > b.Float(-1) && a.Float(-2) <= b.Float(-2)
}
// EasyIndex returns an index to the `n` -length object that allows for negative indexing. For example, EasyIndex(-1, 5) returns 4. This is similar to Python's negative indexing. The return value may be less than zero if (-i) > n.
func EasyIndex(i, n int) int {
if i < 0 {