Update doc matches name change sparse_ to mapped_

doc/samples/mapped_vector.cpp

@@ -0,0 +1,27 @@
+//
+//  Copyright (c) 2000-2002
+//  Joerg Walter, Mathias Koch
+//
+//  Permission to use, copy, modify, distribute and sell this software
+//  and its documentation for any purpose is hereby granted without fee,
+//  provided that the above copyright notice appear in all copies and
+//  that both that copyright notice and this permission notice appear
+//  in supporting documentation.  The authors make no representations
+//  about the suitability of this software for any purpose.
+//  It is provided "as is" without express or implied warranty.
+//
+//  The authors gratefully acknowledge the support of
+//  GeNeSys mbH & Co. KG in producing this work.
+//
+
+#include <boost/numeric/ublas/vector_sparse.hpp>
+#include <boost/numeric/ublas/io.hpp>
+
+int main () {
+    using namespace boost::numeric::ublas;
+    mapped_vector<double> v (3, 3);
+    for (unsigned i = 0; i < v.size (); ++ i)
+        v (i) = i;
+    std::cout << v << std::endl;
+}
+