MATLAB: Initializing some variables in base workspace when running simulink model

base workspaceinitializing variablesMATLABsimulink

I'd like to initialize some variables in base workspace during initialization phase of simulation in SIMULINK. Is there such a block in SIMULINK doing this or so?

For more clarification I have a user written code in my simulink model applied by using interprete MATLAB Fnc Block in which all the history of the input signal is needed. To solve this I used to assign a vector to the base workspace after adding the block new input value and read that vector in the next loop(I mean next sample time). Now every thing is fine and my model works properly but I've bored initializing that vector in base workspace manually before each simulation. I'd like it to be done automatically. Any suggestion?

Best Answer

You can use model callbacks and initialize your parameters in init function

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MATLAB: Bring To Workspace variables from Simulink to base workspace from a matlab function

Use Simset. See details here. The 'DstWorkspace' property specifies the workspace in which to assign any variables defined in the model. The default is the current workspace. Change the destination workspace to 'Base'. Hope this helps!!

MATLAB: Is it possible to force the S-Function block to initialize completely before the other blocks during the course of a simulation in Simulink 7.3(R2009a)

The ability to force the S-Function block to initialize completely before the atomic subsystem during the course of simulation is available in Simulink 7.3 (R2009a).

In order to do so, please enter the following commands in the 'StartFcn' callback under 'Model Properties'.

set_param('Sfun_and_subsystem', 'SimulationCommand', 'pause')
set_param('Sfun_and_subsystem', 'SimulationCommand', 'update')
set_param('Sfun_and_subsystem', 'SimulationCommand', 'continue')

These commands will force the Simulink model to re-evaluate all blocks in the model for tunable parameter changes.

The extra update re-runs the S-Function initialization and forces the Constant block in the atomic subsystem to reinitialize.

Hence they pick up the model parameter values set in the S-Function initialization.

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MATLAB: Bring To Workspace variables from Simulink to base workspace from a matlab function

MATLAB: Is it possible to force the S-Function block to initialize completely before the other blocks during the course of a simulation in Simulink 7.3(R2009a)

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