Returning fixed-size vector from Point2::vector()

gtsam/base/Vector.h

@@ -34,6 +34,7 @@ namespace gtsam {
 typedef Eigen::VectorXd Vector;
 
 // Commonly used fixed size vectors
+typedef Eigen::Vector2d Vector2;
 typedef Eigen::Vector3d Vector3;
 typedef Eigen::Matrix<double, 6, 1> Vector6;
 

gtsam/geometry/Point2.h

@@ -180,7 +180,7 @@ public:
   double y() const {return y_;}
 
   /// return vectorized form (column-wise). TODO: why does this function exist?
-  Vector vector() const { return Vector_(2, x_, y_); }
+  Vector2 vector() const { return Vector2(x_, y_); }
 
   /// @}
   /// @name Deprecated (non-const, non-functional style. Do not use).