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floats: add Average method on floats.Slice
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parent
114e292d8f
commit
2a074ba11b
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@ -73,7 +73,10 @@ func (s Slice) Add(b Slice) (c Slice) {
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}
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}
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func (s Slice) Sum() (sum float64) {
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func (s Slice) Sum() (sum float64) {
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return floats.Sum(s)
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for _, v := range s {
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sum += v
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}
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return sum
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}
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}
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func (s Slice) Mean() (mean float64) {
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func (s Slice) Mean() (mean float64) {
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@ -97,6 +100,18 @@ func (s Slice) Tail(size int) Slice {
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return win
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return win
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}
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}
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func (s Slice) Average() float64 {
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if len(s) == 0 {
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return 0.0
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}
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total := 0.0
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for _, value := range s {
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total += value
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}
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return total / float64(len(s))
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}
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func (s Slice) Diff() (values Slice) {
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func (s Slice) Diff() (values Slice) {
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for i, v := range s {
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for i, v := range s {
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if i == 0 {
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if i == 0 {
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@ -171,17 +186,19 @@ func (s Slice) Addr() *Slice {
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func (s Slice) Last() float64 {
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func (s Slice) Last() float64 {
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length := len(s)
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length := len(s)
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if length > 0 {
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if length > 0 {
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return (s)[length-1]
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return s[length-1]
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}
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}
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return 0.0
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return 0.0
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}
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}
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// Index fetches the element from the end of the slice
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// WARNING: it does not start from 0!!!
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func (s Slice) Index(i int) float64 {
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func (s Slice) Index(i int) float64 {
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length := len(s)
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length := len(s)
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if length-i <= 0 || i < 0 {
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if i < 0 || length-1-i < 0 {
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return 0.0
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return 0.0
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}
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}
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return (s)[length-i-1]
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return s[length-1-i]
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}
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}
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func (s Slice) Length() int {
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func (s Slice) Length() int {
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