From 775546f63d04778ab26b401fc179746fa3fb71a7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kjetil=20=C3=98rbekk?= <kjetil.orbekk@gmail.com>
Date: Mon, 21 May 2012 14:59:38 +0200
Subject: Process data and output in gnuplot format.

---
 .../src/main/java/com/orbekk/stats/Analysis.java   | 32 ++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 statserver/src/main/java/com/orbekk/stats/Analysis.java

(limited to 'statserver/src/main/java/com/orbekk/stats/Analysis.java')

diff --git a/statserver/src/main/java/com/orbekk/stats/Analysis.java b/statserver/src/main/java/com/orbekk/stats/Analysis.java
new file mode 100644
index 0000000..a6d0271
--- /dev/null
+++ b/statserver/src/main/java/com/orbekk/stats/Analysis.java
@@ -0,0 +1,32 @@
+package com.orbekk.stats;
+
+import java.util.List;
+
+public class Analysis {
+    final List<Double> samples;
+    
+    public Analysis(List<Double> samples) {
+        this.samples = samples;
+    }
+    
+    public double getAverage() {
+        double sum = 0.0;
+        for (Double d : samples) {
+            sum += d;
+        }
+        return sum / samples.size();
+    }
+    
+    public double getVariance() {
+        double average = getAverage();
+        double sumDifferences = 0.0;
+        for (Double d : samples) {
+            sumDifferences += (d - average) * (d - average);
+        }
+        return sumDifferences / samples.size();
+    }
+    
+    public double getStandardDeviation() {
+        return Math.sqrt(getVariance());
+    }
+}
-- 
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