Main Content


Set MATLAB function to run after each simulation



simIn = setPostSimFcn(simIn,func) configures the post-simulation function associated with the function handle func on the Simulink.SimulationInput object simIn. The Simulink.SimulationOutput object is passed as an argument to this function. func is any MATLAB® function and can be used to do the post processing on the output. Post-processed data, must be returned as values in a structure. These values are then packed into the Simulink.SimulationOutput output to replace the usual logged data or add new data to the Simulink.SimulationOutput object.


collapse all

This example specifies a post simulation function for a simulation using a Simulink.SimulationInput object.

Create a PostSimFcn that calculates the mean for logged outputs.

function newout = postsim(out);
newout.mean = mean(out.yout);

Create a SimulationInput object for the model vdp.

simIn = Simulink.SimulationInput('vdp');
simIn = setPostSimFcn(simIn,@(x) postsim(x));
simIn = setModelParameter(simIn,'SaveOutput','on');

Simulate the model.

out = sim(simIn);

View the result from the post simulation function.


As a best practice, avoid using ErrorMessage and SimulationMetadata as field names in the function.

Input Arguments

collapse all

Simulation inputs and configuration, specified as a Simulink.SimulationOutput object.

Function to run after each simulation completes, specified as a function handle or a function name. The software passes the Simulink.SimulationOutput object. For example:

simIn = simIn.setPostSimFcn(@myPostSim)
where myPostSim is a MATLAB function.
function newSimOut = myPostSim(simOut); %the function can change the contents of the output object before returning to the client
newSimOut.meanValue = (simOut.yout(:,1)); %we post process the output for only the relevant values. 
newSimOut = simOut;
You can also specify the post-simulation function as a function handle with additional arguments.
function newSimOut = myPostSim_additionalArgs(simOut,additionalArg1,additionalArg2) %the function can change the contents of the simulation input after parsim runs the simulation
     newSimOut = simOut;

Output Arguments

collapse all

Simulation configuration with post simulation function added, returned as a Simulink.SimulationInput object.

Version History

Introduced in R2017a