From 8f1fc80a77551b26c05669527534aff7b621b86c Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Thu, 22 May 2008 16:31:00 +0000
Subject: some documentation fixes (Cwise* and Cholesky)

---
 doc/examples/class_CwiseBinaryOp.cpp | 22 +++++-----------------
 1 file changed, 5 insertions(+), 17 deletions(-)

(limited to 'doc/examples/class_CwiseBinaryOp.cpp')

diff --git a/doc/examples/class_CwiseBinaryOp.cpp b/doc/examples/class_CwiseBinaryOp.cpp
index b91abd1ef..f95090b4d 100644
--- a/doc/examples/class_CwiseBinaryOp.cpp
+++ b/doc/examples/class_CwiseBinaryOp.cpp
@@ -1,29 +1,17 @@
-// FIXME - this example is not too good as that functionality is provided in the Eigen API
-// additionally it's quite heavy. the CwiseUnaryOp example is better.
-
 #include <Eigen/Core>
 USING_PART_OF_NAMESPACE_EIGEN
 using namespace std;
 
 // define a custom template binary functor
-template<typename Scalar> struct CwiseMinOp EIGEN_EMPTY_STRUCT {
-    Scalar operator()(const Scalar& a, const Scalar& b) const { return std::min(a,b); }
-    enum { Cost = Eigen::ConditionalJumpCost + Eigen::NumTraits<Scalar>::AddCost };
+template<typename Scalar> struct MakeComplexOp EIGEN_EMPTY_STRUCT {
+  typedef complex<Scalar> result_type;
+  complex<Scalar> operator()(const Scalar& a, const Scalar& b) const { return complex<Scalar>(a,b); }
+  enum { Cost = 0 };
 };
 
-// define a custom binary operator between two matrices
-template<typename Derived1, typename Derived2>
-const Eigen::CwiseBinaryOp<CwiseMinOp<typename Derived1::Scalar>, Derived1, Derived2>
-cwiseMin(const MatrixBase<Derived1> &mat1, const MatrixBase<Derived2> &mat2)
-{
-  return Eigen::CwiseBinaryOp<CwiseMinOp<typename Derived1::Scalar>, Derived1, Derived2>(mat1, mat2);
-}
-
 int main(int, char**)
 {
   Matrix4d m1 = Matrix4d::random(), m2 = Matrix4d::random();
-  cout << cwiseMin(m1,m2) << endl;            // use our new global operator
-  cout << m1.cwise<CwiseMinOp<double> >(m2) << endl;   // directly use the generic expression member
-  cout << m1.cwise(m2, CwiseMinOp<double>()) << endl; // directly use the generic expression member (variant)
+  cout << m1.cwise(m2, MakeComplexOp<double>()) << endl;
   return 0;
 }
-- 
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