TH NextGen - The scatter plot

Modes of Chart Visualization 

As soon as a tag or attribute is added and active, it is visualized on the focus chart. The focus chart can visualize your data in three different ways: 

  • Stacked trend plot 
  • Trend plot 
  • Scatter plot 

The visualization option in this document is focused on "Scatter" visualization. This option can be selected by clicking the focus chart visualization mode button option below the chart. 

Scatter Plot 


The image above shows an overview of what the multi-level scatter plot looks like.  

  • The scatter plots visualize the correlation between the values of two tags and/or attributes, and can help identify operational regimes. 
  • The histogram plots represent an approximate distribution, in bins, of the numerical data of the visualized tags or attributes. 

Levels of Scatter Plot visualization 

Multiple levels of visualization are possible in the Scatter plot visualization mode. Depending on the number of visible tags or attributes, some 'levels' can be blocked and are not accessible until more data references are added.  

Navigating through the levels can be done by clicking the plots themselves or using the available buttons named "Multi scatter" and "Single scatter" situated at the top of the charting area. 

  • Single histogram plot: When there is only one visible tag or attribute present, and the scatter plot visualization is selected, a histogram is visualized.  

In the following example, only a histogram can be visualized, and both navigation buttons are disabled. 


  • Single scatter Plot : When the scatter plot is selected with two visible tags and/or attributes, a single scatter plot with two histograms is visualized.  

As an indication, the "Single scatter" navigation button is highlighted when the single level is shown. 

In this case, you can clickthrough to visualize any of the two histograms or to maximize the scatter plot on the charting plot. Returning to the single scatter plot with both histograms is done by clicking the navigation button "Single scatter".



  • Multi Scatter plot: With two or more visible tags and/or attributes, a switch to scatter plot will visualize a multi-level scatter plot overview.  As an indication, the "Multi scatter" navigation button is highlighted when the multi-level is shown. 

In this overview:

  • Clicking on a histogram, navigates to a single histogram plot of the corresponding tag or attribute. 
  • Clicking on a scatter plot navigates to a single scatter plot with both corresponding tags or attributes. On this level you can again navigate one level deeper into a single histogram or maximize the scatter plot.  

Returning to the other overviews (single or multi-level) is possible by clicking any of the navigation buttons.  


Note: A tooltip will be displayed when hovering on a disabled button, to indicate the required actions needed to unlock that button. 

Scatter Plot Actions 

At the top of the scatter plot multiple actions are available.  



These buttons are highlighted when you are located at one of the scatter view types. Choose between multi scatter overview or single scatter overview.


The Draw button gives you the ability to create, update or remove an area on a single scatter plot (with or without histograms), as long as the draw option is enabled (highlighted in blue). 

Create an area by clicking somewhere on the single scatter plot. After the first click you will see a blue dot appearing, this dot (or corner) is connected to your mouse pointer with a line. The following clicks will place a new dot that interconnects with the previous dot and starts to form the area. To complete the drawn area, a double click is required. This will place a final dot and connects the first placed dot with the final dot. 


Made a mistake while drawing your area? An area can easily be adjusted by dragging the corners of the area. While doing this, the dot (corner) will immediately move along and update the area. Once dropped, the area update is completed.  

The area can also be moved to a better fitting location or for fine-tuning. This is done by clicking somewhere on the drawn area and moving it over to the desired location. 

As a final option, you can also remove the drawn area and start creating a new one. This is done by hovering over the drawn area which reveals a popup with a remove option called "Remove selection".  

Note: For now, one area can be drawn at a time and can be used in the Operating area search. 


Inspect enables you to dive deeper into the details of the visible data points on single scatter plots (with or without histograms).  

When this option is enabled, more detail and information is shown. On the single scatter plots, a popup is shown where you can see the values of both data references (tags and attributes) and the timestamp of occurrence for the point that is being hovered upon. 

Hovering over a number of data points will trigger a popup that will contain information, in the form of a scrollable list, on all the data points in the area you are hovering over.  


When your single scatter plot also presents two histograms, hover over the bins of the histogram to reveal bin range. 


Chart Actions  

On the scatter plot update tags and/or attributes using their labels. This comes in handy when you have a single scatter plot, or a fully visualized histogram shown. In these cases, you can simply switch to another tag or attribute using their label. 


Clicking on one of the labels shows you a list of all the other visible tags and attributes. Selecting one of the other data references in the list will update the current scatter plot or histogram with the data of the newly selected tag or attribute.  

Scatter Chart Settings 

The settings are found at the top right of the focus chart under the blue settings button. 

For the Scatter chart we have the following available settings: 

  • Colored points: When enabling the "Colored points" option, the color of the scatter plot data points are displayed in blue to orange, instead of the default grey/black color. The blue to orange color code indicates the transition from oldest to newest points in time. 


Note: This option is disabled by default. 

  • Correlation: When the option "Correlation" is enabled, additional tiles are displayed. These tiles represent the correlation coefficient together with its equation value for a specific scatter plot. 

You can easily see which correlation tile is linked to which scatter plot by hovering over the tiles. The two linked tiles will be highlighted with a blue border.  


When a single scatter plot without histograms is visualized, the correlation tile is not shown. Instead you can see the correlation coefficient and its equation value on the left below the chart.  


Note: This option is enabled by default. 

  • Gridlines: Once the "Gridlines" option is enabled, gridlines appear on the single scatter charts, making it easier to read values on the chart.  


Note: This option is disabled by default. 

Show Histograms: The "Show histograms" option can show or hide the histograms.  



Note: All the settings of the chart are saved for your user only. The options will be saved and reused in the next session. 

Note: All chart settings are also saved inside a view. Meaning, when a colleague opens one of your views, your chart settings will be enabled for their view. Your settings are yours, as long as your colleague does not save that view as one of their own views. 

Time range selection: The buttons underneath the focus chart remain fully functional in the scatter plot mode. Read the time navigation article to learn more.  

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