Regional Brushing

Regional brushing allows for visually marking data points using scatter plots or trends.  Regions are linked to indexes.  Once regions are brushed, all indexes related to the marked regions are flagged.  Regions are global, which means that once a region has been brushed, all other variables related to the brushed region will also be displayed as brushed.

Regional brushing for Trends

These options are accessed from the Trend toolbar found on every Trend view.

  • Adding a brushed region

    To add a region to the global brushed region, click on the [add region button] on the Trend view and simply click and drag an area on the graph. This can be done multiple times to include multiple regions in the region brush. The brushed region is highlighted in an alternative color.

  • Removing a brushed region

    To remove a region from the global brushed region, click on the [remove region button] on the Trend view toolbar and then simply click and drag an area on the graph. This can be done multiple times to include multiple regions in the region brush.

  • Remove all brushed regions

    To remove regions from the global brushed region click on the remove all regions button.

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Regional brushing for Scatter plots

These options are accessed from the Scatter plot toolbar found on every Scatter plot view.

  • Adding a brushed region

    1. Click on the add region button on the scatter plot toolbar

    2. Left-click and release your mouse cursor anywhere on the scatter plot to start a polygon selection.  

    3. Move the mouse and click again to add another point to the polygon selection.  

    4. Double click to complete the polygon selection area.  

    5. The brushed region is highlighted in an alternate color.

  • Removing a brushed region

    1. Click on the remove region button on the scatter plot toolbar

    2. Left-click and release your mouse cursor anywhere on the scatter plot to start a polygon selection.  

    3. Move the mouse and click again to add another point to the polygon selection.  

    4. Double click to complete the polygon selection area.  

    5. The selected region is removed from the global region brush.

  • Remove all brushed regions

To remove regions from the global brushed region click on the [remove all regions] button.

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Regional brushing for PCA Models

  • Brushing a new region

    1. Click on the add a region button of an open PCA plot. If the add region button of the Score plot is selected the a region can only be marked on the score plot and visa versa for the SPE plot. However the brushed region will be displayed in both plots

    2. Mark the boundaries of the area by clicking on the corners of the region.

    3. Double click to close the area selected. This region will now be marked in yellow.

  • Removing a region from a PCA plot

    1. Click on the remove a region button of a PCA plot.

    2. Mark the boundaries of the area by clicking on the corners of the region. Double click to close the area selected. This region will be marked in red again.

  • Removing all regions from a scatter plot

    1. Click on the remove all regions button to remove all brushed regions.

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Regional brushing for PLS Models

  • Brushing a new region

    1. Click on the add a region button of an open PLS plot. If the add region button of the Score plot is selected the a region can only be marked on the score plot and visa versa for the SPE plot. However the brushed region will be displayed in both plots

    2. Mark the boundaries of the area by clicking on the corners of the region.

    3. Double click to close the area selected. This region will now be marked in yellow.

  • Removing a region from a scatter plot

    1. Click on the remove a region button of a PLS plot.

    2. Mark the boundaries of the area by clicking on the corners of the region. Double click to close the area selected. This region will be marked in red again.

  • Removing all regions from a scatter plot

    1. Click on the remove all regions button to remove all brushed regions.

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CSense 2023- Last updated: June 24,2025
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