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Helper API refactor (#40)

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* api cleaup

* updates

* wtf

* updates

* snapshot.

* tweaks

* snapshot

* api tweaks.

* updates

* updates

* updates

* changes.

* updates

* updates

* sequence => seq

* dont need to use curl, just using wget

* fixing examples
This commit is contained in:
Will Charczuk 2017-05-12 17:12:23 -07:00 • committed by GitHub
parent 43212f871f
commit 03708a90ef
100 changed files with 1687 additions and 1055 deletions
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24
sma_series.go
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@ -1,6 +1,10 @@
package chart
import "fmt"
import (
"fmt"
util "github.com/wcharczuk/go-chart/util"
)
const (
// DefaultSimpleMovingAveragePeriod is the default number of values to average.
@ -14,7 +18,7 @@ type SMASeries struct {
YAxis YAxisType
Period int
InnerSeries ValueProvider
InnerSeries ValuesProvider
}
// GetName returns the name of the time series.
@ -48,25 +52,25 @@ func (sma SMASeries) GetPeriod(defaults ...int) int {
return sma.Period
}
// GetValue gets a value at a given index.
func (sma SMASeries) GetValue(index int) (x, y float64) {
// GetValues gets a value at a given index.
func (sma SMASeries) GetValues(index int) (x, y float64) {
if sma.InnerSeries == nil || sma.InnerSeries.Len() == 0 {
return
}
px, _ := sma.InnerSeries.GetValue(index)
px, _ := sma.InnerSeries.GetValues(index)
x = px
y = sma.getAverage(index)
return
}
// GetLastValue computes the last moving average value but walking back window size samples,
// GetLastValues computes the last moving average value but walking back window size samples,
// and recomputing the last moving average chunk.
func (sma SMASeries) GetLastValue() (x, y float64) {
func (sma SMASeries) GetLastValues() (x, y float64) {
if sma.InnerSeries == nil || sma.InnerSeries.Len() == 0 {
return
}
seriesLen := sma.InnerSeries.Len()
px, _ := sma.InnerSeries.GetValue(seriesLen - 1)
px, _ := sma.InnerSeries.GetValues(seriesLen - 1)
x = px
y = sma.getAverage(seriesLen - 1)
return
@ -74,11 +78,11 @@ func (sma SMASeries) GetLastValue() (x, y float64) {
func (sma SMASeries) getAverage(index int) float64 {
period := sma.GetPeriod()
floor := Math.MaxInt(0, index-period)
floor := util.Math.MaxInt(0, index-period)
var accum float64
var count float64
for x := index; x >= floor; x-- {
_, vy := sma.InnerSeries.GetValue(x)
_, vy := sma.InnerSeries.GetValues(x)
accum += vy
count += 1.0
}