private void choose_anomaly_button(object sender, RoutedEventArgs e)
        {
            int indexOfChosen = listAnomalies.SelectedIndex;

            if (indexOfChosen == -1)
            {
                MessageBox.Show("Please choose an anomaly!");
            }
            vm.AnomalyGraphButton(indexOfChosen);
            if (vm.ButtonChosenAnomalyGraphPressed)
            {
                AnomaliesGraph.InvalidateVisual();
            }
            else
            {
                MessageBox.Show("Please choose an anomaly!");
            }
        }