better without createConvertedData?

Device/Histo/SimulationResult.cpp

@@ -81,7 +81,7 @@ std::vector<double> SimulationResult::flatVector(Coords units) const
 
 Datafield* SimulationResult::datafield(Coords units) const
 {
-    return m_coordsys->createConvertedData(*m_data, units);
+    return new Datafield(m_coordsys->convertedAxes(units), m_data->flatVector());
 }
 
 std::pair<double, double> SimulationResult::axisMinMax(size_t i, Coords units) const