more documentation, 12 more code snippets

Eigen/src/Core/Random.h

@@ -26,6 +26,12 @@
 #ifndef EIGEN_RANDOM_H
 #define EIGEN_RANDOM_H
 
+/** \class Random
+  *
+  * \brief Expression of a random matrix or vector.
+  *
+  * \sa MatrixBase::random(), MatrixBase::random(int), MatrixBase::random(int,int)
+  */
 template<typename MatrixType> class Random : NoOperatorEquals,
   public MatrixBase<typename MatrixType::Scalar, Random<MatrixType> >
 {
@@ -59,12 +65,42 @@ template<typename MatrixType> class Random : NoOperatorEquals,
     int m_rows, m_cols;
 };
 
+/** \returns a random matrix (not an expression, the matrix is immediately evaluated).
+  *
+  * The parameters \a rows and \a cols are the number of rows and of columns of
+  * the returned matrix. Must be compatible with this MatrixBase type.
+  *
+  * This variant is meant to be used for dynamic-size matrix types. For fixed-size types,
+  * it is redundant to pass \a rows and \a cols as arguments, so random() should be used
+  * instead.
+  *
+  * Example: \include MatrixBase_random_int_int.cpp
+  * Output: \verbinclude MatrixBase_random_int_int.out
+  *
+  * \sa random(), random(int)
+  */
 template<typename Scalar, typename Derived>
 const Eval<Random<Derived> > MatrixBase<Scalar, Derived>::random(int rows, int cols)
 {
   return Random<Derived>(rows, cols).eval();
 }
 
+/** \returns a random vector (not an expression, the vector is immediately evaluated).
+  *
+  * The parameter \a size is the size of the returned vector.
+  * Must be compatible with this MatrixBase type.
+  *
+  * \only_for_vectors
+  *
+  * This variant is meant to be used for dynamic-size vector types. For fixed-size types,
+  * it is redundant to pass \a size as argument, so random() should be used
+  * instead.
+  *
+  * Example: \include MatrixBase_random_int.cpp
+  * Output: \verbinclude MatrixBase_random_int.out
+  *
+  * \sa random(), random(int,int)
+  */
 template<typename Scalar, typename Derived>
 const Eval<Random<Derived> > MatrixBase<Scalar, Derived>::random(int size)
 {
@@ -73,6 +109,17 @@ const Eval<Random<Derived> > MatrixBase<Scalar, Derived>::random(int size)
   else return Random<Derived>(size, 1).eval();
 }
 
+/** \returns a fixed-size random matrix or vector
+  * (not an expression, the matrix is immediately evaluated).
+  *
+  * This variant is only for fixed-size MatrixBase types. For dynamic-size types, you
+  * need to use the variants taking size arguments.
+  *
+  * Example: \include MatrixBase_random.cpp
+  * Output: \verbinclude MatrixBase_random.out
+  *
+  * \sa random(int), random(int,int)
+  */
 template<typename Scalar, typename Derived>
 const Eval<Random<Derived> > MatrixBase<Scalar, Derived>::random()
 {