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Cards in this section are used to visualize and analyze events in bulk. An event consists of a start and end timestamp, similar to a time range, but can also be enriched with other data to support analysis.
Every event set is visualized using an Events plot, which plots events on a time axis at the bottom of the chart.
Event sets and events plots are backed by transform tables, where each row is treated as a single event. The backing transform table can be accessed through the next actions menu of the event set by selecting Convert > New transform table. You can use the backing transform table to modify or enrich the underlying event data. For example, you may want to compute a color label column for each event. You can then use the column to color code in the Colors settings under Event Options in the Display tab of the Editor panel.
An event indicator series creates a time series out of an event set indicating the number of events occurring at a given time.
Create an event set by specifying a list of time ranges for each event. Create each event by selecting a range parameter, or separately inputting start and end timestamps. Customize the title and description that appear in an event's tooltip by editing the corresponding fields in the Input event data section in the Data tab of the editor panel. When a range parameter is used, its title and annotation automatically populate the event's title and description, if available.
Create an event set from a tabular data source such as an object set, transform table, or materialization. The start and end timestamps of each event are populated using a column or property from the input table, specified in the Events configuration settings in the Data tab of the editor panel.
Create an event set by starting from a base object and finding related objects through Ontology-defined links (also referred to as a search around). Multiple layers of object relations can be traversed to build an event set of the desired type, and then the event set can optionally be filtered. Set the start and end timestamps for the events by specifying which object properties hold this data in the Events configuration settings in the Data tab of the editor panel. A linked event set can also be created from a starting time series. In this case, the root object of the time series will be used as the base object. Linked event sets are object-based, so the event tooltips are populated using data from each object.
Visually display when certain conditions are met on one or more time series plots, such as when the source series exceeds value 100 and another series hits a specified threshold. The time series search formula should return a boolean value, and an event will be created over every time interval in which this boolean value is true.
@property
syntax.AND
to OR
.longer than one hour
, or shorter than one day
.$AN < 5 && $W = $X
).Modify an existing event set by shifting the start and end timestamps forwards or backwards by a duration.
Compare the behavior of a time series across multiple events by isolating and aligning the segments of the time series where each event is occurring. The plot displays the time series segments in relative time, so that the value at the each event's start time is aligned to zero. The image below shows how the event comparison plot can be used to visualize the behavior of temperature in a tea vat over 80 degrees.