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

adding helpers for annotation series creation.

Browse source
This commit is contained in:
Will Charczuk 2016-07-10 19:45:24 -07:00
parent c4a5de77ed
commit 28ce6623e1
2 changed files with 44 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

43
annotation_series.go
View file

@ -1,6 +1,47 @@
package chart
import "math"
import (
"math"
"time"
"github.com/wcharczuk/go-chart"
)
// CreateContinuousSeriesLastValueLabel returns a (1) value annotation series.
func CreateContinuousSeriesLastValueLabel(name string, xvalues, yvalues []float64, valueFormatter ValueFormatter) AnnotationSeries {
return AnnotationSeries{
Name: name,
Style: Style{
Show: true,
StrokeColor: chart.GetDefaultSeriesStrokeColor(0),
},
Annotations: []chart.Annotation{
Annotation{
X: xvalues[len(xvalues)-1],
Y: yvalues[len(yvalues)-1],
Label: valueFormatter(yvalues[len(yvalues)-1]),
},
},
}
}
// CreateTimeSeriesLastValueLabel returns a (1) value annotation series.
func CreateTimeSeriesLastValueLabel(name string, xvalues []time.Time, yvalues []float64, valueFormatter ValueFormatter) AnnotationSeries {
return AnnotationSeries{
Name: name,
Style: Style{
Show: true,
StrokeColor: chart.GetDefaultSeriesStrokeColor(0),
},
Annotations: []chart.Annotation{
Annotation{
X: xvalues[len(xvalues)-1],
Y: yvalues[len(yvalues)-1],
Label: valueFormatter(yvalues[len(yvalues)-1]),
},
},
}
}
// Annotation is a label on the chart.
type Annotation struct {