Callback function file to execute immediately before logging starts
You configure StartFcn to execute a callback function file when all prelogging steps have been completed. You start logging by calling the start function. A start event occurs immediately before Logging is set to 'on'.
When a start event occurs, the function specified in StartFcn is passed two parameters: Obj and EventInfo. Obj is the object associated with the event, and EventInfo is an event structure containing the fields Type and Data. The Type field is set to 'Start'. The Data field contains a structure with the fields given below.
The time, as a MATLAB® date vector, that the event occurred.
The group name.
The number of records acquired in the current logging session at the time the event occurred.
Start event information is stored in the EventLog property.
string, function handle, or cell array
The default value is an empty matrix ().