Update Body::S

Change variable name to reflect that we are only using Pxx and not the
full P matrix.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/body.h b/src/body.h
index 6c1268e..38497e6 100644
--- a/src/body.h
+++ b/src/body.h
@@ -38,7 +38,7 @@ class Body
                 const Quaterniond &q, const double dt);
         Matrix<double,9,9> Q(double dt);
         Matrix<double,1,1> R();
-        Matrix<double,1,1> S(const Matrix<double,9,9> &P);
+        Matrix<double,1,1> S(const Matrix<double,9,9> &Pxx);
         Matrix<double,3,3> skewSymmetric(const Vector3d &x);
         void unicsv();