Panel: Simple Line Chart¶
Overview¶
A simple representation of data over time, with buttons to quickly define scope of time displayed. Configurable time quick selects and thresholds. Limited to one number-type signal.
This panel provides the ability to visualize signal history (time series) on a line chart. The line chart is intentionally a basic view of the data that updates as new data is received.
For more complex views of time series data and showing multiple signals, the Panel: Complex Line Chart should be used.
Configuration options¶
The simple line chart supports 1 signal which can be selected on the Signal Selection step.
Default View Options¶
| Option | Default | Description |
|---|---|---|
| Panel Title | Name of Signal | Text on the dashboard panel header |
| Default View | Live Mode | The default time period shown |
| Live Mode Time & Points | 30 Minutes 1000 Reported Data Points | In Live Mode time view, specify the max number of minutes or hours and max number of points to show. Note that the max is 8 hours and 1000 points. These are configurable based on the fact different signals have different report rates. |
| Display Horizontal Grid-lines | Off | When enabled, shows horizontal grid lines. |
| Display Legend | Off | When enabled, shows a legend for the signals on the chart. |
| Data Gaps | Off | When enabled, will show gaps in lines when the data points are greater than the number of times the report rate set. For example, if set to 3 times the report rate and the report rate is 60 seconds, a gap will be shown if two data points are greater than 180 seconds apart. |
| Show Timeline Navigator | Off | Show a timeline navigation panel at the bottom of the chart. |
| Display Min/Max | Off | For all Time Modes except Live, data is down-sampled. If turned on, this will show the minimum and maximum values during the down sampled periods in addition to the average. |
| Highlight Key Signal | On | Will show a specific signal's last value and optionally units at the top of the chart. Optionally can hide if signal is past its timeout setting. |
Time Navigation¶
Allows setting up to 5 selectable time periods in the chart in addition to Live mode.
Data Types¶
Allows setting options for specific signals on the chart.
| Option | Default | Description |
|---|---|---|
| Thresholds | Allows showing one signal's thresholds for one rule on the chart. If there is a threshold for a signal when the chart is created, the threshold will automatically be turned on. (see Condition Rules) | |
| Display Units | Default Unit of Signal | Allows converting the units in the panels. |
| Axis Range | Allows setting the Y Axis range. If a threshold rule is available when the chart is created, it will default to Auto-Generate the Y axis range, otherwise defaults to 0 to 100. |
Baselines¶
Allows setting a baseline horizontal line for the chart, for one signal, if any of the signals have a baseline property set.
Line Gaps¶
Line gaps will be shown if the signal has a set report rate. The chart uses 3x multiplier of the signal's report rate property to determine if a gap will be shown. By default the Simple Line panel will not connect data points with an unexpected gap.
Timeout Handling¶
If the signal being displayed has a timeout property set, the chart will grey out if the last reported value is longer than the set timeout property value.
