Attribute Plot

A widget that plots the value of one or serveral devices attribute over time. The plotting of attributes is based on a Time Window, which defines the duration (in seconds) covered by the plot’s x-axis. At any given time, the widget plots each included attribute over the last n seconds, where n is the size of the time window.

Widget setting

The following image shows an example of a widget setting.

It is possible to customize the widget settings from the inspector panel (in edit mode), as shown below:

Input value	Description
Time Window	Defines how much time (in seconds) is shown on the x-axis of the plot
Graphs	Opens the configuration for individual plots (see below)
Show Zero Line	A zero line is drawn on the graph when enabled
X-axis Scientific Notation	Enable this option to display the X-axis values in scientific notation
Y-axis Scientific Notation	Enable this option to display the Y-axis values in scientific notation
X-axis Logarithmic Scale	Enable to apply a logarithmic scale to the X-axis
Y-axis Logarithmic Scale	Enable to apply a logarithmic scale to the Y-axis
Show Tango Database Name	Displays the tango database name in front of the attribute name
Text Color	Specify the text color for the given widget
Background Color	Specify the background color for the given widget

Graph configuration

When clicking on the Graphs option, a new plot can be configured with the following settings:

Input value	Description
Device	Type in a device name (or * to list all)
Attribute	Once a device is selected, type in an attribute name (or * to list all available attributes)
Attribute Display	Select the Label, or Name for the attribute
Y Axis	Sets the Y axis position (left ir right)
Line Color	Specify the line color for the given widget

Widget design

Taranta is using the Plotly framwork to render the plots. Each plot is automatically assigned a unique color, and the range of the y-axis self-adjusts to fit all data points for every plot being displayed. By hovering over the widget in run mode, additional options are made available from a toolbar, such as zooming and panning. These come from the plotly framework itself, but the functionality of two of them have been overwritten to better suit Taranta. By clicking autoscale, the time-window mode is disabled, and the y-axis instead covers all data points it has registered so far. To go back to the windowed mode, click on Reset axis.

The same plot in run mode, showing all data points recieved in the last 20 seconds for both attributes.