Changeset 2566

Timestamp:

Sep 26, 2011, 2:58:58 AM (11 years ago)

Author:

Peter

Message:

optimization

File:

• trunk/yat/statistics/AveragerPair.cc (modified) (1 diff)

trunk/yat/statistics/AveragerPair.cc

@@ -62 +62 @@
   double AveragerPair::correlation(void) const
   { 
-    return covariance() / std::sqrt(x_.variance()*y_.variance());
+    return sum_xy_centered() / 
+      std::sqrt(x_.sum_xx_centered() * y_.sum_xx_centered());
   }