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linear_regression_series_test.go
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linear_regression_series_test.go
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package chart
import (
"testing"
assert "github.com/blend/go-sdk/assert"
"github.com/beevee/go-chart/seq"
)
func TestLinearRegressionSeries(t *testing.T) {
assert := assert.New(t)
mainSeries := ContinuousSeries{
Name: "A test series",
XValues: seq.Range(1.0, 100.0),
YValues: seq.Range(1.0, 100.0),
}
linRegSeries := &LinearRegressionSeries{
InnerSeries: mainSeries,
}
lrx0, lry0 := linRegSeries.GetValues(0)
assert.InDelta(1.0, lrx0, 0.0000001)
assert.InDelta(1.0, lry0, 0.0000001)
lrxn, lryn := linRegSeries.GetLastValues()
assert.InDelta(100.0, lrxn, 0.0000001)
assert.InDelta(100.0, lryn, 0.0000001)
}
func TestLinearRegressionSeriesDesc(t *testing.T) {
assert := assert.New(t)
mainSeries := ContinuousSeries{
Name: "A test series",
XValues: seq.Range(100.0, 1.0),
YValues: seq.Range(100.0, 1.0),
}
linRegSeries := &LinearRegressionSeries{
InnerSeries: mainSeries,
}
lrx0, lry0 := linRegSeries.GetValues(0)
assert.InDelta(100.0, lrx0, 0.0000001)
assert.InDelta(100.0, lry0, 0.0000001)
lrxn, lryn := linRegSeries.GetLastValues()
assert.InDelta(1.0, lrxn, 0.0000001)
assert.InDelta(1.0, lryn, 0.0000001)
}
func TestLinearRegressionSeriesWindowAndOffset(t *testing.T) {
assert := assert.New(t)
mainSeries := ContinuousSeries{
Name: "A test series",
XValues: seq.Range(100.0, 1.0),
YValues: seq.Range(100.0, 1.0),
}
linRegSeries := &LinearRegressionSeries{
InnerSeries: mainSeries,
Offset: 10,
Limit: 10,
}
assert.Equal(10, linRegSeries.Len())
lrx0, lry0 := linRegSeries.GetValues(0)
assert.InDelta(90.0, lrx0, 0.0000001)
assert.InDelta(90.0, lry0, 0.0000001)
lrxn, lryn := linRegSeries.GetLastValues()
assert.InDelta(80.0, lrxn, 0.0000001)
assert.InDelta(80.0, lryn, 0.0000001)
}