add mean without NaN

src/main/java/miscellaneous/QueueMemory.java

@@ -78,7 +78,7 @@ public class QueueMemory<E extends Number> extends ArrayBlockingQueue<E> {
 		double sum = 0.;
 		double total = 0.;
 		for (E item : this) {
-			if (this.doubleValue(item) > 0.) {
+			if (this.doubleValue(item) != 0.) {
 				sum += this.doubleValue(item);
 				total++;
 			}
@@ -90,6 +90,23 @@ public class QueueMemory<E extends Number> extends ArrayBlockingQueue<E> {
 	}
 
 
+	public double getMeanWithoutNaN() {
+		double sum = 0.;
+		double total = 0.;
+		for (E item : this) {
+			Double value = this.doubleValue(item);
+			if (!Double.isNaN(value)) {
+				sum += value;
+				total++;
+			}
+		}
+		if (total > 0) {
+			sum = sum / total;
+		}
+		return (sum);
+	}
+
+
 	public double getGeometricMean() {
 		double sum = 0.;
 		for (E item : this) {