octave: Use vector_value()

src/duneevaluate.cc

@@ -16,7 +16,7 @@ DEFUN_DLD(duneevaluate, args, nargout, "duneevaluate(y)\n\
 Evaluate x -> 1/2<Ax,x> - <b,x> + H(|x|) at y using DUNE\n") {
   assert(args.length() == 1);
   assert(nargout <= 1);
-  ColumnVector point(args(0).matrix_value());
+  ColumnVector point(args(0).vector_value());
 
   int const dim = 2;
 

src/duneminimise.cc

@@ -16,7 +16,7 @@ DEFUN_DLD(duneminimise, args, nargout, "duneminimise(y)\n\
 Make a minimisation step of x -> 1/2<Ax,x> - <b,x> + H(|x|) using DUNE starting at x\n") {
   assert(args.length() == 1);
   assert(nargout <= 1);
-  ColumnVector current(args(0).matrix_value());
+  ColumnVector current(args(0).vector_value());
 
   int const dim = 2;