readtimetable

Read timetable from event stream

Since R2022b

This function requires Streaming Data Framework for MATLAB^® Production Server™.

Syntax

tt = readtimetable(stream)

Description

tt = readtimetable(stream) creates a timetable from an event stream.

readtimetable converts events from an event stream into rows of a timetable, where:

• The names in the event body become the timetable column names.

• The value associated with each name becomes the column value in the event row.

• The event timestamp becomes the row timestamp.

Examples

Create Timetable from Event Stream

Assume that you have a Kafka^® server running at the network address kafka.host.com:9092 that has a topic CoolingFan.

Create a KafkaStream object for reading from and writing to the CoolingFan topic.

ks = kafkaStream("kafka.host.com",9092,"CoolingFan");

Read events from the CoolingFan topic into a timetable.

tt = readtimetable(ks)

tt =

  50×11 timetable

         timestamp          vMotor    wMotor    Tmass     
    ____________________    ______    ______    ______    

    31-Oct-2020 00:00:00    1.0909         0        25           
    31-Oct-2020 00:00:00    1.1506     100.5     25.17           
    31-Oct-2020 00:00:00    1.1739     190.9    25.223             
    31-Oct-2020 00:00:00     1.162    267.96    25.192           
    31-Oct-2020 00:00:00    1.1454    330.61     25.15            

             :                :         :         :         

    31-Oct-2020 00:00:19    1.0269    239.35    25.785        
    31-Oct-2020 00:00:19    1.0332    240.45    25.803            
    31-Oct-2020 00:00:19    1.0267    263.98    25.784             
    31-Oct-2020 00:00:19    1.0262    243.69    25.783            
    31-Oct-2020 00:00:19    1.0262    257.21    25.783            

	Display all 50 rows.

Input Arguments

stream — Object connected to event stream

KafkaStream object | InMemoryStream object | TestStream object

Object connected to an event stream, specified as a KafkaStream, InMemoryStream, or TestStream object.

Version History

Introduced in R2022b