diff --git a/Plugins/org.mitk.gui.qt.chartExample/src/internal/ChartExample.cpp b/Plugins/org.mitk.gui.qt.chartExample/src/internal/ChartExample.cpp
index 25cc7a28c2..f4c95972e1 100644
--- a/Plugins/org.mitk.gui.qt.chartExample/src/internal/ChartExample.cpp
+++ b/Plugins/org.mitk.gui.qt.chartExample/src/internal/ChartExample.cpp
@@ -1,500 +1,523 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical and Biological Informatics.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 // Blueberry
 #include <berryIQtStyleManager.h>
 #include <berryWorkbenchPlugin.h>
 
 // Qmitk
 #include "ChartExample.h"
 
 // Qt
 #include <QRandomGenerator>
 
 const std::string ChartExample::VIEW_ID = "org.mitk.views.chartexample";
 
 void ChartExample::SetFocus()
 {
   m_Controls.m_buttonCreateChart->setFocus();
 }
 
 void ChartExample::CreateQtPartControl(QWidget *parent)
 {
   // create GUI widgets from the Qt Designer's .ui file
   m_Controls.setupUi(parent);
   CreateConnectionsForGUIElements();
   connect(m_Controls.m_comboBoxChartType, &QComboBox::currentTextChanged, this, &ChartExample::AdaptDataGUI);
 
   m_Controls.m_groupBoxErrors->setVisible(false);
   m_Controls.m_groupBoxXErrors->setVisible(false);
   m_Controls.m_groupBoxYErrors->setVisible(false);
   m_Controls.m_lineEditDataXVector->setVisible(false);
   m_Controls.m_lineEditDataXVector->setText("0;1;2;3;4;5;6;7;8;9");
   ResetDataGUI();
 
   m_Controls.m_doubleSpinBox_maxZoomX->setValue(10);
   m_Controls.m_doubleSpinBox_maxZoomY->setValue(10);
 
   FillRandomDataValues();
   auto chartStyle = GetColorTheme();
   m_Controls.m_Chart->SetTheme(chartStyle);
 
   m_Controls.m_lineEditXAxisLabel->setText("xLabel");
   m_Controls.m_lineEditYAxisLabel->setText("yLabel");
 
   m_ChartNameToChartType.emplace("bar", QmitkChartWidget::ChartType::bar);
   m_ChartNameToChartType.emplace("line", QmitkChartWidget::ChartType::line);
   m_ChartNameToChartType.emplace("spline", QmitkChartWidget::ChartType::spline);
   m_ChartNameToChartType.emplace("pie", QmitkChartWidget::ChartType::pie);
   m_ChartNameToChartType.emplace("area", QmitkChartWidget::ChartType::area);
   m_ChartNameToChartType.emplace("area-spline", QmitkChartWidget::ChartType::area_spline);
   m_ChartNameToChartType.emplace("scatter", QmitkChartWidget::ChartType::scatter);
 
   m_LineNameToLineType.emplace("solid", QmitkChartWidget::LineStyle::solid);
   m_LineNameToLineType.emplace("dashed", QmitkChartWidget::LineStyle::dashed);
 
   m_AxisScaleNameToAxisScaleType.emplace("linear", QmitkChartWidget::AxisScale::linear);
   m_AxisScaleNameToAxisScaleType.emplace("logarithmic", QmitkChartWidget::AxisScale::log);
 
   m_LegendPositionNameToLegendPositionType.emplace("bottom middle", QmitkChartWidget::LegendPosition::bottomMiddle);
   m_LegendPositionNameToLegendPositionType.emplace("bottom right", QmitkChartWidget::LegendPosition::bottomRight);
   m_LegendPositionNameToLegendPositionType.emplace("top right", QmitkChartWidget::LegendPosition::topRight);
   m_LegendPositionNameToLegendPositionType.emplace("top left", QmitkChartWidget::LegendPosition::topLeft);
   m_LegendPositionNameToLegendPositionType.emplace("middle right", QmitkChartWidget::LegendPosition::middleRight);
 }
 
 void ChartExample::CreateConnectionsForGUIElements()
 {
   connect(m_Controls.m_buttonCreateChart, &QPushButton::clicked, this, &ChartExample::CreateChart);
   connect(m_Controls.m_buttonUpdateChart, &QPushButton::clicked, this, &ChartExample::UpdateChart);
   connect(m_Controls.m_buttonClearChart, &QPushButton::clicked, this, &ChartExample::ClearChart);
   connect(m_Controls.m_buttonAddData, &QPushButton::clicked, this, &ChartExample::AddData);
   connect(m_Controls.m_checkBoxEnableDataX, &QCheckBox::toggled, this, &ChartExample::ShowXData);
   connect(m_Controls.m_checkBoxEnableErrors, &QCheckBox::toggled, this, &ChartExample::ShowErrorOptions);
   connect(m_Controls.m_checkBoxEnableXErrors, &QCheckBox::toggled, this, &ChartExample::ShowXErrorOptions);
   connect(m_Controls.m_checkBoxEnableYErrors, &QCheckBox::toggled, this, &ChartExample::ShowYErrorOptions);
   connect(m_Controls.m_doubleSpinBox_minZoomX, &QSpinBox::editingFinished, this, &ChartExample::AdaptZoomX);
   connect(m_Controls.m_doubleSpinBox_maxZoomX, &QSpinBox::editingFinished, this, &ChartExample::AdaptZoomX);
   connect(m_Controls.m_doubleSpinBox_minZoomY, &QSpinBox::editingFinished, this, &ChartExample::AdaptZoomY);
   connect(m_Controls.m_doubleSpinBox_maxZoomY, &QSpinBox::editingFinished, this, &ChartExample::AdaptZoomY);
   connect(m_Controls.m_comboBoxLegendPosition, &QComboBox::currentTextChanged, this, &ChartExample::OnLegendPositionChanged);
   connect(m_Controls.m_lineEditTitle, &QLineEdit::editingFinished, this, &ChartExample::OnTitleChanged);
   connect(m_Controls.m_lineEditXAxisLabel, &QLineEdit::editingFinished, this, &ChartExample::OnXAxisLabelChanged);
   connect(m_Controls.m_lineEditYAxisLabel, &QLineEdit::editingFinished, this, &ChartExample::OnYAxisLabelChanged);
   connect(
     m_Controls.m_comboBoxYAxisScale, &QComboBox::currentTextChanged, this, &ChartExample::OnYAxisScaleChanged);
   connect(m_Controls.m_checkBoxShowLegend, &QCheckBox::stateChanged, this, &ChartExample::OnShowLegendChanged);
   connect(m_Controls.m_checkBoxStackedData, &QCheckBox::stateChanged, this, &ChartExample::OnStackedDataChanged);
   connect(m_Controls.m_checkBoxShowDataPoints, &QCheckBox::stateChanged, this, &ChartExample::OnShowDataPointsChanged);
   connect(m_Controls.m_checkBoxShowSubchart, &QCheckBox::stateChanged, this, &ChartExample::OnShowSubchartChanged);
 }
 
 void ChartExample::CreateChart()
 {
   auto dataYAxisScaleType =
     m_AxisScaleNameToAxisScaleType.at(m_Controls.m_comboBoxYAxisScale->currentText().toStdString());
   auto xAxisLabel = m_Controls.m_lineEditXAxisLabel->text().toStdString();
   auto yAxisLabel = m_Controls.m_lineEditYAxisLabel->text().toStdString();
   auto showLegend = m_Controls.m_checkBoxShowLegend->isChecked();
   auto legendPosition =
     m_LegendPositionNameToLegendPositionType.at(m_Controls.m_comboBoxLegendPosition->currentText().toStdString());
   auto showDataPoints = m_Controls.m_checkBoxShowDataPoints->isChecked();
   auto stackedData = m_Controls.m_checkBoxStackedData->isChecked();
   auto showSubchart = m_Controls.m_checkBoxShowSubchart->isChecked();
   auto title = m_Controls.m_lineEditTitle->text().toStdString();
 
   m_Controls.m_Chart->SetTitle(title);
   m_Controls.m_Chart->SetYAxisScale(dataYAxisScaleType);
   m_Controls.m_Chart->SetXAxisLabel(xAxisLabel);
   m_Controls.m_Chart->SetYAxisLabel(yAxisLabel);
   m_Controls.m_Chart->SetShowLegend(showLegend);
   m_Controls.m_Chart->SetLegendPosition(legendPosition);
   m_Controls.m_Chart->SetShowErrorBars(true);
   m_Controls.m_Chart->SetShowDataPoints(showDataPoints);
   m_Controls.m_Chart->SetStackedData(stackedData);
   m_Controls.m_Chart->Show(showSubchart);
 }
 
+void ChartExample::UpdateData()
+{
+    if (m_Controls.m_comboBoxExistingData->currentText().isEmpty())
+    {
+        m_Controls.m_labelInfo->setText("Please enter a valid Datalabel");
+        m_Controls.m_labelInfo->setStyleSheet("{color: ##ff0000}");
+        return;
+    }
+
+    if (m_Controls.m_lineEditDataLabel->text() != m_Controls.m_comboBoxExistingData->currentText())
+    {
+        return;
+    }
+
+    auto dataLabel = m_Controls.m_lineEditDataLabel->text().toStdString();
+    m_Controls.m_Chart->RemoveData(dataLabel);
+
+    auto it = std::find(labelStorage.begin(), labelStorage.end(), dataLabel);
+    labelStorage.erase(it);
+
+    auto index = m_Controls.m_comboBoxExistingData->findText(QString::fromStdString(dataLabel));
+    m_Controls.m_comboBoxExistingData->removeItem(index);
+    AddData();
 }
 
 void ChartExample::ClearChart()
 {
   m_Controls.m_Chart->Clear();
   m_Controls.m_plainTextEditDataView->clear();
 }
 
 std::vector<double> ChartExample::ConvertToDoubleVector(const QString &data, QChar delimiter) const
 {
   std::vector<double> output;
   if (data.isEmpty())
   {
     return output;
   }
 
   for (const QString entry : data.split(delimiter))
   {
     output.push_back(entry.toDouble());
   }
   return output;
 }
 
 std::vector<std::string> ChartExample::ConvertToStringVector(const QString &data, QChar delimiter) const
 {
   std::vector<std::string> output;
   if (data.isEmpty())
   {
     return output;
   }
 
   for (const QString entry : data.split(delimiter))
   {
     output.push_back(entry.toStdString());
   }
   return output;
 }
 
 void ChartExample::AddData()
 {
   QString data = m_Controls.m_lineEditDataYVector->text();
   auto dataY = ConvertToDoubleVector(data);
 
   auto chartType = m_ChartNameToChartType.at(m_Controls.m_comboBoxChartType->currentText().toStdString());
   std::string dataLabel = m_Controls.m_lineEditDataLabel->text().toStdString();
   std::string dataColor = m_Controls.m_lineEditColor->text().toStdString();
   auto dataLineStyleType = m_LineNameToLineType.at(m_Controls.m_comboBoxLineStyle->currentText().toStdString());
 
   if (m_Controls.m_checkBoxEnableDataX->isChecked())
   {
     QString lineEditDataX = m_Controls.m_lineEditDataXVector->text();
     auto dataX = ConvertToDoubleVector(lineEditDataX);
     if (dataX.size() != dataY.size())
     {
       mitkThrow() << "data x and y size have to be equal";
     }
     auto dataXandY = CreateMap(dataX, dataY);
     data = QString::fromStdString(ConvertToText(dataXandY));
 
     m_Controls.m_Chart->AddData2D(dataXandY, dataLabel, chartType);
   }
   else
   {
     m_Controls.m_Chart->AddData1D(dataY, dataLabel, chartType);
   }
   if (!dataColor.empty())
   {
     m_Controls.m_Chart->SetColor(dataLabel, dataColor);
   }
 
   if (chartType == QmitkChartWidget::ChartType::pie)
   {
     QString pieLabelsData = m_Controls.m_lineEditPieDataLabel->text();
     if (!pieLabelsData.isEmpty())
     {
       auto pieLabels = ConvertToStringVector(pieLabelsData);
       m_Controls.m_Chart->SetPieLabels(pieLabels, dataLabel);
     }
   }
 
   if (m_Controls.m_checkBoxEnableErrors->isChecked())
   {
     if (m_Controls.m_checkBoxEnableXErrors->isChecked())
     {
       auto errorsPlus = ConvertToDoubleVector(m_Controls.m_lineEditXErrorPlus->text());
       auto errorsMinus = ConvertToDoubleVector(m_Controls.m_lineEditXErrorMinus->text());
       m_Controls.m_Chart->SetXErrorBars(m_Controls.m_lineEditDataLabel->text().toStdString(), errorsPlus, errorsMinus);
     }
     if (m_Controls.m_checkBoxEnableYErrors->isChecked())
     {
       auto errorsPlus = ConvertToDoubleVector(m_Controls.m_lineEditYErrorPlus->text());
       auto errorsMinus = ConvertToDoubleVector(m_Controls.m_lineEditYErrorMinus->text());
       m_Controls.m_Chart->SetYErrorBars(m_Controls.m_lineEditDataLabel->text().toStdString(), errorsPlus, errorsMinus);
     }
   }
 
   m_Controls.m_Chart->SetLineStyle(dataLabel, dataLineStyleType);
 
   QString dataOverview;
   dataOverview.append(m_Controls.m_lineEditDataLabel->text());
   dataOverview.append("(").append(m_Controls.m_comboBoxChartType->currentText());
   if (!dataColor.empty())
   {
     dataOverview.append(", ").append(dataColor.c_str());
   }
   dataOverview.append(", ").append(m_Controls.m_comboBoxLineStyle->currentText());
   dataOverview.append(")");
   dataOverview.append(":").append(data);
 
   m_Controls.m_plainTextEditDataView->appendPlainText(dataOverview);
 
   FillRandomDataValues();
 }
 
 void ChartExample::ShowXData(bool show)
 {
   m_Controls.m_lineEditDataXVector->setVisible(show);
 }
 
 void ChartExample::ShowErrorOptions(bool show)
 {
   m_Controls.m_groupBoxErrors->setVisible(show);
 }
 
 void ChartExample::ShowXErrorOptions(bool show)
 {
   m_Controls.m_groupBoxXErrors->setVisible(show);
 }
 
 void ChartExample::ShowYErrorOptions(bool show)
 {
   m_Controls.m_groupBoxYErrors->setVisible(show);
 }
 
 void ChartExample::AdaptZoomX()
 {
   m_Controls.m_Chart->SetMinMaxValueXView(m_Controls.m_doubleSpinBox_minZoomX->value(),
                                              m_Controls.m_doubleSpinBox_maxZoomX->value());
   m_Controls.m_Chart->Show();
 }
 
 void ChartExample::AdaptZoomY()
 {
   m_Controls.m_Chart->SetMinMaxValueYView(m_Controls.m_doubleSpinBox_minZoomY->value(),
                                              m_Controls.m_doubleSpinBox_maxZoomY->value());
   m_Controls.m_Chart->Show();
 }
 
 void ChartExample::AdaptDataGUI(const QString &chartType)
 {
   auto chartTypeEnum = m_ChartNameToChartType.at(chartType.toLower().toStdString());
   if (chartTypeEnum == QmitkChartWidget::ChartType::pie)
   {
     m_Controls.m_labelPieData->setVisible(true);
     m_Controls.m_lineEditPieDataLabel->setVisible(true);
     m_Controls.m_labelLineStyle->setVisible(false);
     m_Controls.m_comboBoxLineStyle->setVisible(false);
   }
   else if (chartTypeEnum != QmitkChartWidget::ChartType::pie)
   {
     m_Controls.m_labelLineStyle->setVisible(true);
     m_Controls.m_comboBoxLineStyle->setVisible(true);
     m_Controls.m_labelPieData->setVisible(false);
     m_Controls.m_lineEditPieDataLabel->setVisible(false);
   }
 }
 
 std::vector<double> ChartExample::GenerateRandomNumbers(unsigned int amount, double max) const
 {
   QRandomGenerator gen;
   gen.seed(time(nullptr));
 
   std::vector<double> data;
   for (unsigned int i = 0; i < amount; i++)
   {
     data.push_back(gen.bounded(max));
   }
 
   return data;
 }
 
 std::map<double, double> ChartExample::CreateMap(std::vector<double> keys, std::vector<double> values) const
 {
   std::map<double, double> aMap;
   std::transform(keys.begin(), keys.end(), values.begin(), std::inserter(aMap, aMap.end()), [](double a, double b) {
     return std::make_pair(a, b);
   });
   return aMap;
 }
 
 std::string ChartExample::ConvertToText(std::vector<double> numbers, std::string delimiter) const
 {
   std::ostringstream oss;
   oss.precision(3);
 
   if (!numbers.empty())
   {
     for (auto number : numbers)
     {
       oss << number << delimiter;
     }
   }
   auto aString = oss.str();
   aString.pop_back();
   return aString;
 }
 
 std::string ChartExample::ConvertToText(std::map<double, double> numbers, std::string delimiter) const
 {
   std::ostringstream oss;
   oss.precision(3);
 
   if (!numbers.empty())
   {
     for (const auto keyValue : numbers)
     {
       oss << keyValue.first << ":" << keyValue.second << delimiter;
     }
   }
   auto aString = oss.str();
   aString.pop_back();
   return aString;
 }
 
 QmitkChartWidget::ColorTheme ChartExample::GetColorTheme() const
 {
   ctkPluginContext *context = berry::WorkbenchPlugin::GetDefault()->GetPluginContext();
   ctkServiceReference styleManagerRef = context->getServiceReference<berry::IQtStyleManager>();
   if (styleManagerRef)
   {
     auto styleManager = context->getService<berry::IQtStyleManager>(styleManagerRef);
     if (styleManager->GetStyle().name == "Dark")
     {
       return QmitkChartWidget::ColorTheme::darkstyle;
     }
     else
     {
       return QmitkChartWidget::ColorTheme::lightstyle;
     }
   }
   return QmitkChartWidget::ColorTheme::darkstyle;
 }
 
 void ChartExample::OnLegendPositionChanged(const QString &newText)
 {
   auto legendPosition = m_LegendPositionNameToLegendPositionType.at(newText.toStdString());
   m_Controls.m_Chart->SetLegendPosition(legendPosition);
 }
 
 void ChartExample::OnTitleChanged() {
   auto newTitle = m_Controls.m_lineEditTitle->text();
   m_Controls.m_Chart->SetTitle(newTitle.toStdString());
 }
 
 void ChartExample::OnXAxisLabelChanged() {
   auto newXAxisLabel = m_Controls.m_lineEditXAxisLabel->text();
   m_Controls.m_Chart->SetXAxisLabel(newXAxisLabel.toStdString());
 }
 
 void ChartExample::OnYAxisLabelChanged() {
   auto newYAxisLabel = m_Controls.m_lineEditYAxisLabel->text();
   m_Controls.m_Chart->SetYAxisLabel(newYAxisLabel.toStdString());
 }
 
 void ChartExample::OnYAxisScaleChanged(const QString &newYAxisScale) {
   auto yAxisScale = m_AxisScaleNameToAxisScaleType.at(newYAxisScale.toStdString());
   m_Controls.m_Chart->SetYAxisScale(yAxisScale);
 }
 
 void ChartExample::OnShowLegendChanged(int newState) {
   m_Controls.m_Chart->SetShowLegend(newState == Qt::Checked);
 }
 
 void ChartExample::OnStackedDataChanged(int newState) {
   m_Controls.m_Chart->SetStackedData(newState == Qt::Checked);
 }
 
 void ChartExample::OnShowDataPointsChanged(int newState) {
   m_Controls.m_Chart->SetShowDataPoints(newState == Qt::Checked);
 }
 
 void ChartExample::OnShowSubchartChanged(int newState) {
   m_Controls.m_Chart->SetShowSubchart(newState == Qt::Checked);
 }
 
 void ChartExample::UpdateSelectedData()
 {
   std::string label = m_Controls.m_comboBoxExistingData->currentText().toStdString();
   auto data = m_Controls.m_Chart->GetDataElementByLabel(label);
 
   if (data == nullptr)
   {
       return;
   }
 
   auto x = data->GetXData();
   auto y = data->GetYData();
 
   auto xVector = x.toVector().toStdVector();
   auto yVector = y.toVector().toStdVector();
 
   std::string xString;
   std::string yString;
 
   for (int i = 0; i < xVector.size(); i++)
   {
       xString.append(xVector[i].toString().toStdString());
       if (i != xVector.size() - 1)
       {
           xString.append(";");
       }
   }
 
   for (int i = 0; i < yVector.size(); i++)
   {
       yString.append(yVector[i].toString().toStdString());
       if (i != yVector.size() - 1)
       {
           yString.append(";");
       }
   }
 
   auto color = data->GetColor();
   auto type = data->GetChartType();
   auto style = data->GetLineStyle();
 
   int colorIndex = m_Controls.m_Chart->GetIndexByString(color.toString().toStdString());
   int typeIndex = m_Controls.m_Chart->GetIndexByString(type.toString().toStdString());
   int styleIndex = m_Controls.m_Chart->GetIndexByString(style.toString().toStdString());
 
   if (type.toString() == "pie")
   {
       m_Controls.m_comboBoxLineStyle->setVisible(false);
       m_Controls.m_labelLineStyle->setVisible(false);
       m_Controls.m_lineEditPieDataLabel->setVisible(true);
       m_Controls.m_labelPieData->setVisible(true);
 
       auto pieLabels = data->GetPieLabels();
 
       auto pieLabelsVector = pieLabels.toVector().toStdVector();
 
       std::string pieLabelsString;
 
       for (int i = 0; i < pieLabelsVector.size(); i++)
       {
           pieLabelsString.append(pieLabelsVector[i].toString().toStdString());
           if (i != pieLabelsVector.size() - 1)
           {
               pieLabelsString.append(";");
           }
       }
 
       m_Controls.m_lineEditPieDataLabel->setText(QString::fromStdString(pieLabelsString));
   }
 
   else
   {
       m_Controls.m_lineEditPieDataLabel->setVisible(false);
       m_Controls.m_labelPieData->setVisible(false);
       m_Controls.m_comboBoxLineStyle->setVisible(true);
       m_Controls.m_labelLineStyle->setVisible(true);
       m_Controls.m_comboBoxLineStyle->setCurrentIndex(styleIndex);
   }
   m_Controls.m_lineEditDataXVector->setText(QString::fromStdString(xString));
   m_Controls.m_lineEditDataYVector->setText(QString::fromStdString(yString));
   m_Controls.m_lineEditDataLabel->setText(QString::fromStdString(label));
   m_Controls.m_comboBoxColor->setCurrentIndex(colorIndex);
   m_Controls.m_comboBoxChartType->setCurrentIndex(typeIndex);
 
 }