diff --git a/data_processing/DataAnalysis.js b/data_processing/DataAnalysis.js
index 8b75bbe..c4ef3e6 100644
--- a/data_processing/DataAnalysis.js
+++ b/data_processing/DataAnalysis.js
@@ -25,7 +25,7 @@ export default class DataAnalysis {
             newData = allMeasurements;
             console.log("cache reset");
         }
-        const allMeasurementsSize = newData.size ? newData.size : newData.length;
+        const allMeasurementsSize = allMeasurements.size ? allMeasurements.size : allMeasurements.length;
         const newDataArr = (typeof newData.toArray ==="function") ? newData.toArray() : newData;
         
         // active time