Sampling Feature for archived and fresh data

pkg/resampler/util.go

@@ -0,0 +1,25 @@
+package resampler
+
+import (
+	"math"
+
+	"github.com/ClusterCockpit/cc-backend/pkg/schema"
+)
+
+func calculateTriangleArea(paX, paY, pbX, pbY, pcX, pcY schema.Float) float64 {
+	area := ((paX-pcX)*(pbY-paY) - (paX-pbX)*(pcY-paY)) * 0.5
+	return math.Abs(float64(area))
+}
+
+func calculateAverageDataPoint(points []schema.Float, xStart int64) (avgX schema.Float, avgY schema.Float) {
+
+	for _, point := range points {
+		avgX += schema.Float(xStart)
+		avgY += point
+		xStart++
+	}
+	l := schema.Float(len(points))
+	avgX /= l
+	avgY /= l
+	return avgX, avgY
+}