add missing code snippets for newer Matrix methods and PartialLU::solve()

Eigen/src/Core/CwiseNullaryOp.h

@@ -274,7 +274,7 @@ EIGEN_STRONG_INLINE Derived& MatrixBase<Derived>::setConstant(const Scalar& valu
   *
   * \only_for_vectors
   *
-  * Example: \include Matrix_set_int.cpp
+  * Example: \include Matrix_setConstant_int.cpp
   * Output: \verbinclude Matrix_setConstant_int.out
   *
   * \sa MatrixBase::setConstant(const Scalar&), setConstant(int,int,const Scalar&), class CwiseNullaryOp, MatrixBase::Constant(const Scalar&)

doc/snippets/Matrix_setConstant_int.cpp

@@ -0,0 +1,3 @@
+VectorXf v;
+v.setConstant(3, 5);
+cout << v << endl;

doc/snippets/Matrix_setConstant_int_int.cpp

@@ -0,0 +1,3 @@
+MatrixXf m;
+m.setConstant(3, 3, 5);
+cout << m << endl;

doc/snippets/Matrix_setIdentity_int_int.cpp

@@ -0,0 +1,3 @@
+MatrixXf m;
+m.setIdentity(3, 3);
+cout << m << endl;

doc/snippets/Matrix_setOnes_int.cpp

@@ -0,0 +1,3 @@
+VectorXf v;
+v.setOnes(3);
+cout << v << endl;

doc/snippets/Matrix_setOnes_int_int.cpp

@@ -0,0 +1,3 @@
+MatrixXf m;
+m.setOnes(3, 3);
+cout << m << endl;

doc/snippets/Matrix_setRandom_int.cpp

@@ -0,0 +1,3 @@
+VectorXf v;
+v.setRandom(3);
+cout << v << endl;

doc/snippets/Matrix_setRandom_int_int.cpp

@@ -0,0 +1,3 @@
+MatrixXf m;
+m.setRandom(3, 3);
+cout << m << endl;

doc/snippets/Matrix_setZero_int.cpp

@@ -0,0 +1,3 @@
+VectorXf v;
+v.setZero(3);
+cout << v << endl;

doc/snippets/Matrix_setZero_int_int.cpp

@@ -0,0 +1,3 @@
+MatrixXf m;
+m.setZero(3, 3);
+cout << m << endl;

doc/snippets/PartialLU_solve.cpp

@@ -0,0 +1,8 @@
+MatrixXd A = MatrixXd::Random(3,3);
+MatrixXd B = MatrixXd::Random(3,2);
+cout << "Here is the invertible matrix A:" << endl << A << endl;
+cout << "Here is the matrix B:" << endl << B << endl;
+MatrixXd X;
+if(A.lu().solve(B, &X))
+cout << "Here is the (unique) solution X to the equation AX=B:" << endl << X << endl;
+cout << "Relative error: " << (A*X-B).norm() / B.norm() << endl;