Modified ToVectorExpression as well

Author: Kwesi Rutledge

symbolic/matrix_expression.go

@@ -124,6 +124,8 @@ func ToMatrixExpression(e interface{}) (MatrixExpression, error) {
 
 	// Convert
 	switch e2 := e.(type) {
+	case *mat.Dense:
+		return DenseToKMatrix(*e2), nil
 	case mat.Dense:
 		return DenseToKMatrix(e2), nil
 	case KMatrix:

symbolic/vector_expression.go

@@ -167,6 +167,8 @@ func ToVectorExpression(e interface{}) (VectorExpression, error) {
 	switch e2 := e.(type) {
 	case KVector:
 		return e2, nil
+	case *mat.VecDense:
+		return VecDenseToKVector(*e2), nil
 	case mat.VecDense:
 		return VecDenseToKVector(e2), nil
 	case VariableVector: