From 08ca8301b8c167bf2b0fc9d025e03adc00c9dedf Mon Sep 17 00:00:00 2001
From: Christoph Ruegg <git@cdrnet.ch>
Date: Sat, 16 Nov 2013 15:47:13 +0100
Subject: [PATCH] Distance: add Pearson's distance

---
 src/Numerics/Distance.cs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/Numerics/Distance.cs b/src/Numerics/Distance.cs
index 8dfca7a3..3fcfc6a3 100644
--- a/src/Numerics/Distance.cs
+++ b/src/Numerics/Distance.cs
@@ -29,8 +29,10 @@
 // </copyright>
 
 using System;
+using System.Collections.Generic;
 using MathNet.Numerics.LinearAlgebra;
 using MathNet.Numerics.Properties;
+using MathNet.Numerics.Statistics;
 
 namespace MathNet.Numerics
 {
@@ -277,5 +279,13 @@ namespace MathNet.Numerics
             }
             return count;
         }
+
+        /// <summary>
+        /// Pearson's distance, i.e. 1 - the person correlation coefficient.
+        /// </summary>
+        public static double Pearson(IEnumerable<double> a, IEnumerable<double> b)
+        {
+            return 1.0 - Correlation.Pearson(a, b);
+        }
     }
 }