From bd7ab7794d169f7946d417af8b483c48085f45b0 Mon Sep 17 00:00:00 2001
From: AlexanderSaydakov <AlexanderSaydakov@users.noreply.github.com>
Date: Tue, 19 Dec 2023 13:13:04 -0800
Subject: [PATCH] one slot in buffer was never used

---
 core/src/main/java/com/tdunning/math/stats/MergingDigest.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/java/com/tdunning/math/stats/MergingDigest.java b/core/src/main/java/com/tdunning/math/stats/MergingDigest.java
index 03748e2..75090a2 100644
--- a/core/src/main/java/com/tdunning/math/stats/MergingDigest.java
+++ b/core/src/main/java/com/tdunning/math/stats/MergingDigest.java
@@ -255,7 +255,7 @@ private void add(double x, int w, List<Double> history) {
         if (Double.isNaN(x)) {
             throw new IllegalArgumentException("Cannot add NaN to t-digest");
         }
-        if (tempUsed >= tempWeight.length - lastUsedCell - 1) {
+        if (tempUsed >= tempWeight.length - lastUsedCell) {
             mergeNewValues();
         }
         int where = tempUsed++;