Log Big Data from Model

Open the example model sldemo_fuelsys.

open_system('sldemo_fuelsys')

Select Configuration Parameters > Data Import/Export > Log Dataset data to file.

set_param('sldemo_fuelsys','LoggingToFile','on')

Simulate the model.

sim('sldemo_fuelsys')

The MAT-file out.mat appears in your current folder. The file contains data for logged signals such as fuel (which is at the root level of the model).

At the command prompt, create a DatasetRef object that refers to the logging variable by name, sldemo_fuelsys_output.

DSRef = Simulink.SimulationData.DatasetRef('out.mat','sldemo_fuelsys_output');

Preview Big Data

Use curly braces ({ and }) to extract the signal element fuel, which is the tenth element in DSRef, as a Simulink.SimulationData.Signal object that contains a SimulationDatastore object.

SimDataSig = DSRef{10};

To more easily interact with the SimulationDatastore object that resides in the Values property of the Signal object, store a handle in a variable named DStore.

DStore = SimDataSig.Values;

Determine if the datastore is partitionable.

if isPartitionable(DStore)
    disp('Datastore is partitionable.')
else
    disp('Datatstore is not partitionable.')
end

Datatstore is not partitionable.