add missing PartialReduxExpr::coeff(index) function

1 files changed, 8 insertions, 0 deletions

diff --git a/Eigen/src/Array/VectorwiseOp.h b/Eigen/src/Array/VectorwiseOp.h
index fa0958987..27e23ce59 100644
--- a/Eigen/src/Array/VectorwiseOp.h
+++ b/Eigen/src/Array/VectorwiseOp.h
@@ -95,6 +95,14 @@ class PartialReduxExpr : ei_no_assignment_operator,
         return m_functor(m_matrix.row(i));
     }
 
+    const Scalar coeff(int index) const
+    {
+      if (Direction==Vertical)
+        return m_functor(m_matrix.col(index));
+      else
+        return m_functor(m_matrix.row(index));
+    }
+
   protected:
     const MatrixTypeNested m_matrix;
     const MemberOp m_functor;