XY Plot



Basics

Scatter plot mode helps users visualize relationships between signals outside of the time domain.  To enter into Scatter Plot, click the mode button in the upper left corner followed by the scatter plot button . In R52 and later, this is XY Plot with Scatter and Density Plot options. In the Scatter Plot view, Seeq will grid up signals and interpolate between data points to ensure that a value is shown for samples in the historian up to 150,000 points. This limit can be changed to any value between 1000 and 1,000,000 by altering the configuration option Features/ScatterPlot/MaxPoints. If more than 8000 points are displayed, then the points may resize for better readability.

Selecting Signals

Any signal present in the Details Pane may be selected as either the x- or y-axis signal. The swap button will change the x- and y-axis selections. In R55 and later, signals can be assigned to an axis in either the toolbar or the Details Pane.

In version R56 and later, more than one signal can be configured to display as a y-axis. Presently each additional y-axis signal will come with its own axis.



Entering Scatter Plot and Selecting Signals

 

Zooming In

Zooming and Navigating

Select anywhere on the Scatter Plot and click the Zoom button to zoom in to that area.

The data is resampled following this zoom to maximize the data displayed. Click Expand to return the x- and y-axis ranges to encompass all the data in the display range.

Navigating the x- and y-axes is the same as Trend View:

  • Hover over the axis, then click and drag to shift the x- or y-axis in that direction.

  • Hover over the axis and use the mouse scroll to zoom in and out. 

 

 

In R55 and later, the x and y axis range can also be configured in the Details Pane when auto min/max is disabled. The Expand button will be the same as reselecting Auto in the Details Pane.

 

Filtering Data in a Scatter Plot

Data in a Scatter Plot can either be filtered to the entire display range or to one or more conditions within the display range.

To enter into the condition filter mode, click the  button above the Scatter Plot and select Condition. If the details pane contains multiple conditions, the Scatter Plot will contain points which falls within any of the conditions. Select the check box next to one or more conditions in the Details Pane to limit the displayed data to a subset of conditions in the Details Pane. Filtering the data is separate from coloring the data.

When filtering by Conditions, the conditions selected will also display as colored regions of the minimap.



Filtering Data by Condition

Coloring the Data

Data can be colored by time, by the values of a signal, or by condition. Condition coloring can be present with both time and signal, but time and signal are exclusive of each other. The priority of the different coloring options is: capsule selection, capsule property, condition, custom date ranges, signal, relative time. A particular point on the Scatter Plot will be colored by the first one of these options which applies to the point.



Color by relative time

Coloring by relative time is the default when navigating to the Scatter Plot. The minimap below the Scatter Plot shows a simple trend of the two signals which are currently being plotted. Three colors can be used to show how the relationship between your signals is changing over time. The oldest data is grey (default 50% of display pane), followed by blue in the middle and the most recent 25% of data is shown in orange. To change the time range represented in each color bucket, drag the arrow between the colors as shown in the screenshot to the right. 

Eliminating color by relative time

To remove the blue and orange colors drag the border between blue and grey all the way to the right side of the minimap. To get the color buckets to reappear, click and drag the triangle back to the relative location desired. Alternatively, turn on coloring by a third series or fixed date ranges to eliminate coloring by relative time.. 

Coloring by Relative Time



Color by Condition

Color by Condition R21.0.44.00 and later

Color by Condition

Select conditions used for coloring from the button above the Scatter Plot. This opens a menu to select one or more conditions in the Details Pane to be used for coloring in the Color based on conditions section. 

Color by Capsule Selection

To color individual points that fall within a specific capsule, select the check box next to the capsule in the Capsules Pane. Then, points that don't fall within a selected capsule will appear faded on the plot.

The color of the points will either match the color of the condition or (if present) the color corresponding to a capsule property value. If you would like to change the color of the points, simply change the condition color by choosing a new color in the Color box associated with that item in the Details Pane.

Color by Capsule Property

Available in R54 and later.

Select a capsule property for coloring by clicking on the  button to open the color pop up, and selecting a capsule property in the Color based on a capsule property section.

Points can be colored based on the values of a capsule property on any condition in the Details Pane. String-valued properties, as well as a capsule's start and end times, will be colored in rainbow colors. Numeric properties will be colored with a gradient similar to coloring by signal; the base color for this gradient can be changed in the color pop up. If a point on the plot is not within a capsule that has the selected capsule property, then it will be colored by a lower-priority coloring option (e.g. condition, signal, color range, relative time). If any conditions are selected in the Details Pane, then values of the capsule property for these conditions will be used for coloring the Scatter Plot points. If a point falls within multiple capsules, then the value used for coloring the point will be the capsule property value from the capsule with the earliest start time that has a valid value for the capsule property.

If you are coloring the points with a capsule property and you select a capsule in the Details Pane, the points within that capsule will appear in the capsule property color (for a string-value property) or the base color of the gradient (for a numeric property). Points not within selected capsules will fade so that the points within the selected capsules stand out.

Color by Capsule Property

 

Color by values of a signal

A third signal can be used to color the points of the scatter plot. Click the  button and select any signal in the Details Pane from the pop up in the Color based on values of a signal section. The color of the points matches the color of the signal, with the gradient light at lowest values in the display range and dark at the highest values in the display range. If you would like to change the color of the points, simply choose a new color in the Color box associated with that signal in the Details Pane.



Color by values of a signal

Color by values of a signal and a condition (pop up)

Color by values of a signal and a condition (result)

 Color by fixed date ranges (pop up)

Color by fixed date ranges

Points can also be colored by fixed date ranges instead of relative date ranges. Identify fixed date ranges used for coloring from the button above the Scatter Plot. This opens a menu to enter in one or more date ranges to be used for coloring in the Color based on fixed date ranges section, very similar to Custom Condition.

Edit the date range or color selected by clicking the Edit icon, or remove the date range to remove the associated coloration.  The start and end dates will be displayed in the legend if within the display range. 

Color by fixed date ranges (result)

Adding Trend Lines

Lines that are functions of a single variable can be added to the Scatter Plot. This applies to single input Predictions and to Formulas with one signal input and any number of scalar inputs. To add or remove a line, select the button. From the pop up, add a new Prediction or Formula based signal by selecting the appropriate signals from the drop down, or remove previously added lines from the Scatter Plot. Only signals in the Details Pane that meet the single variable input criteria are able to be selected.

Line colors may be changed after the trend line is displayed by choosing a new color in the color box associated with that item in the Details Pane.



Add a function of x

Pop up to select or remove

 

Single Input Prediction

Any new single input Prediction created based on the x- and y-axis signals will automatically display after executed. The name and the r squared value are automatically displayed.

When displaying a Prediction that is not associated with x- or y-axis variables, a yellow triangle is displayed in the Details Pane indicating that it may not be relevant to display. Similarly, a yellow triangle will be present in the Details Pane associated with this item if the training window of the Prediction is entirely outside the display range. 

Single Input Prediction

Single Variable Formula

Single Variable Formula

Display any function of x through Formula. When opening Formula from the Add or remove a function of x pop up, the x-axis variable is automatically assigned to the variable $x. Variable name is not required to be $x nor is it required to be associated with the x-axis in the Scatter Plot.

When displaying a function that is based on some variable other than the x-axis, a yellow triangle is displayed in the Details Pane indicating it may not be relevant to the display. 

Scalars can also be included as constant inputs into this single variable formula