[io] add vector file writer, usable for Octave and Matlab

similar to Matlab matrix writer

dune/istl/test/iotest.cc

@@ -23,6 +23,19 @@ void testWriteMatrixToMatlab(BlockType b=BlockType(0.0))
   writeMatrixToMatlabHelper(A, 0, 0, std::cout);
 }
 
+/* uses the writeVectorToMatlab method, filled with dummy data */
+template <class VectorType>
+void testWriteVectorToMatlab()
+{
+  VectorType v;
+  for (unsigned int i = 0; i < v.size(); ++i)
+  {
+    v[i] = i;
+  }
+
+  Dune::writeVectorToMatlabHelper(v, std::cout);
+}
+
 int main(int argc, char** argv)
 {
   /* testing the writeMatrixToMatlabHelper method for BlockType=FieldMatrix with different field_types */
@@ -50,4 +63,21 @@ int main(int argc, char** argv)
   testWriteMatrixToMatlab<Dune::ScaledIdentityMatrix<std::complex<double>,1> >(Dune::ScaledIdentityMatrix<std::complex<double>,1>(std::complex<double>(0,1)));
   testWriteMatrixToMatlab<Dune::DiagonalMatrix<std::complex<double>,2> >(Dune::DiagonalMatrix<std::complex<double>,2>(std::complex<double>(0,1)));
   testWriteMatrixToMatlab<Dune::ScaledIdentityMatrix<std::complex<double>,2> >(Dune::ScaledIdentityMatrix<std::complex<double>,2>(std::complex<double>(0,1)));
+
+
+  /* testing the test writeMatrixToMatlabHelper for FieldVector */
+  testWriteVectorToMatlab<Dune::FieldVector<double,1> >();
+  testWriteVectorToMatlab<Dune::FieldVector<float,5> >();
+  testWriteVectorToMatlab<Dune::FieldVector<std::complex<double>,5> >();
+  /* testing the test writeMatrixToMatlabHelper for BlockVector */
+  Dune::BlockVector<Dune::FieldVector<double,3> > v1 = {{1.0, 2.0, 3.0}};
+  Dune::writeVectorToMatlabHelper(v1, std::cout);
+  Dune::BlockVector<Dune::BlockVector<Dune::FieldVector<double,1> > > v2 = {{1.0, 2.0}, {3.0, 4.0, 5.0}, {6.0}};
+  Dune::writeVectorToMatlabHelper(v2, std::cout);
+  /* testing the test writeMatrixToMatlabHelper for STL containers */
+  testWriteVectorToMatlab<std::array<double,5> >();
+  std::vector<double> v3;
+  v3.push_back(1);
+  v3.push_back(2);
+  Dune::writeVectorToMatlabHelper(v3, std::cout);
 }