Changeset 219 for trunk/src/AveragerPair.h

Timestamp:

Dec 30, 2004, 11:30:17 PM (18 years ago)

Author:

Peter

Message:

sum_xy_centered(void) added

File:

• trunk/src/AveragerPair.h (modified) (3 diffs)

trunk/src/AveragerPair.h

@@ -66 +66 @@
   
     ///
-    /// @return The number of pair of data points.
-    ///
-    inline long n(void) const { return x_.n(); }
-
-    ///
     /// @return The mean of xy.
     ///
@@ -82 +77 @@
 
     ///
+    /// @return The number of pair of data points.
+    ///
+    inline long n(void) const { return x_.n(); }
+
+    ///
     /// Resets everything to zero
     ///
@@ -90 +90 @@
     ///
     inline double sum_xy(void) const { return xy_; }
+
+    ///
+    /// @return \f$ \sum_i (x_i-m_x)(y_i-m_y)\f$
+    ///
+    inline double sum_xy_centered(void) const {return xy_-x_.sum_x()*y_.mean();}
 
     ///