Add Count()

histogram_test.go

@@ -14,8 +14,8 @@ func TestHistogram(t *testing.T) {
 	for _, val := range testData {
 		h.Add(float64(val))
 	}
-	if h.total != 14999 {
-		t.Errorf("Expected h.total to be 100, got ", h.total)
+	if h.Count() != 14999 {
+		t.Errorf("Expected h.Count() to be 100, got ", h.Count())
 	}
 
 	if firstQ := h.Quantile(0.25); !approx(firstQ, 14) {

numerichistogram.go

@@ -103,6 +103,10 @@ func (h *NumericHistogram) Variance() float64 {
 	return sum / float64(h.total)
 }
 
+func (h *NumericHistogram) Count() float64 {
+	return float64(h.total)
+}
+
 // trim merges adjacent bins to decrease the bin count to the maximum value
 func (h *NumericHistogram) trim() {
 	for len(h.bins) > h.maxbins {

weightedhistogram.go

@@ -128,6 +128,10 @@ func (h *WeightedHistogram) Variance() float64 {
 	return sum / h.total
 }
 
+func (h *WeightedHistogram) Count() float64 {
+	return h.total
+}
+
 func (h *WeightedHistogram) trim() {
 	total := 0.0
 	for i := range h.bins {