X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=altoslib%2FAltosTimeSeries.java;h=9f3b4d807ef26bb36ae9a358515ac41c17f3bad5;hp=b3c432fcf565e1b481d63e0025024334a8d90061;hb=4f2cbe0c537c9f417aae310cc3b89f84e0915103;hpb=b9a00856aa4cf55ae4a143288058094ef8061134

diff --git a/altoslib/AltosTimeSeries.java b/altoslib/AltosTimeSeries.java
index b3c432fc..9f3b4d80 100644
--- a/altoslib/AltosTimeSeries.java
+++ b/altoslib/AltosTimeSeries.java
@@ -151,11 +151,15 @@ public class AltosTimeSeries implements Iterable<AltosTimeValue>, Comparable<Alt
 	}
 
 	public AltosTimeValue first() {
-		return values.get(0);
+		if (values.size() > 0)
+			return values.get(0);
+		return null;
 	}
 
 	public AltosTimeValue last() {
-		return values.get(values.size() - 1);
+		if (values.size() > 0)
+			return values.get(values.size() - 1);
+		return null;
 	}
 
 	public double average() {