Changeset 2559

Timestamp:

Sep 24, 2011, 11:11:48 PM (11 years ago)

Author:

Peter

Message:

minor speed-up. refs #671

File:

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

trunk/yat/statistics/Averager.cc

@@ -54 +54 @@
   {
     double delta = d - mean_;
-    mean_ += n*delta/(n+n_);
-    m2_ += delta*delta*n_*n/(n_+n);
+    double R = delta * static_cast<double>(n) / static_cast<double>(n+n_);
+    mean_ += R;
+    m2_ += n_ * delta * R;
     n_  += n;
     assert(n_>-1);