zeni/go-chart
1
0
Fork 0
Code Issues Pull requests Projects Releases 2 Packages Wiki Activity Actions

Helper API refactor (#40)

Browse source 
* 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
Download patch file Download diff file Expand all files Collapse all files

23
polynomial_regression_series.go
View file

@ -5,6 +5,7 @@ import (
"math"
"github.com/wcharczuk/go-chart/matrix"
util "github.com/wcharczuk/go-chart/util"
)
// PolynomialRegressionSeries implements a polynomial regression over a given
@ -17,7 +18,7 @@ type PolynomialRegressionSeries struct {
Limit int
Offset int
Degree int
InnerSeries ValueProvider
InnerSeries ValuesProvider
coeffs []float64
}
@ -39,7 +40,7 @@ func (prs PolynomialRegressionSeries) GetYAxis() YAxisType {
// Len returns the number of elements in the series.
func (prs PolynomialRegressionSeries) Len() int {
return Math.MinInt(prs.GetLimit(), prs.InnerSeries.Len()-prs.GetOffset())
return util.Math.MinInt(prs.GetLimit(), prs.InnerSeries.Len()-prs.GetOffset())
}
// GetLimit returns the window size.
@ -54,7 +55,7 @@ func (prs PolynomialRegressionSeries) GetLimit() int {
func (prs PolynomialRegressionSeries) GetEndIndex() int {
windowEnd := prs.GetOffset() + prs.GetLimit()
innerSeriesLastIndex := prs.InnerSeries.Len() - 1
return Math.MinInt(windowEnd, innerSeriesLastIndex)
return util.Math.MinInt(windowEnd, innerSeriesLastIndex)
}
// GetOffset returns the data offset.
@ -79,8 +80,8 @@ func (prs *PolynomialRegressionSeries) Validate() error {
return nil
}
// GetValue returns the series value for a given index.
func (prs *PolynomialRegressionSeries) GetValue(index int) (x, y float64) {
// GetValues returns the series value for a given index.
func (prs *PolynomialRegressionSeries) GetValues(index int) (x, y float64) {
if prs.InnerSeries == nil || prs.InnerSeries.Len() == 0 {
return
}
@ -94,14 +95,14 @@ func (prs *PolynomialRegressionSeries) GetValue(index int) (x, y float64) {
}
offset := prs.GetOffset()
effectiveIndex := Math.MinInt(index+offset, prs.InnerSeries.Len())
x, y = prs.InnerSeries.GetValue(effectiveIndex)
effectiveIndex := util.Math.MinInt(index+offset, prs.InnerSeries.Len())
x, y = prs.InnerSeries.GetValues(effectiveIndex)
y = prs.apply(x)
return
}
// GetLastValue computes the last poly regression value.
func (prs *PolynomialRegressionSeries) GetLastValue() (x, y float64) {
// GetLastValues computes the last poly regression value.
func (prs *PolynomialRegressionSeries) GetLastValues() (x, y float64) {
if prs.InnerSeries == nil || prs.InnerSeries.Len() == 0 {
return
}
@ -113,7 +114,7 @@ func (prs *PolynomialRegressionSeries) GetLastValue() (x, y float64) {
prs.coeffs = coeffs
}
endIndex := prs.GetEndIndex()
x, y = prs.InnerSeries.GetValue(endIndex)
x, y = prs.InnerSeries.GetValues(endIndex)
y = prs.apply(x)
return
}
@ -138,7 +139,7 @@ func (prs *PolynomialRegressionSeries) values() (xvalues, yvalues []float64) {
yvalues = make([]float64, endIndex-startIndex)
for index := startIndex; index < endIndex; index++ {
x, y := prs.InnerSeries.GetValue(index)
x, y := prs.InnerSeries.GetValues(index)
xvalues[index-startIndex] = x
yvalues[index-startIndex] = y
}