MATLAB: Simulink mask callback adding variables to workspace

simulink subsystem mask callback workspace

Hi, I have a subsystem with a mask and a callback function based on what option the user chooses in the mask dialogue. I set some variables in the callback function as below

rev = 1

The variable appears in the matlab workspace. Is there a way to keep the variable from appearing in the workspace but still be able to use it in the callback function code? Thanks, Amish

Best Answer

You can take all that initialization code and move it from a block callback to the "Initialization" tab of the Mask Editor. The variables created will belong only to the masked block's workspace, so they cannot be tampered with in the base workspace.

http://www.mathworks.com/help/simulink/ug/initialize-mask.html

- Sebastian

Related Solutions

MATLAB: Does ASSIGNIN assign a value in the MATLAB base workspace rather than mask workspace when setting a value within the mask initialization callback in Simulink 7.0 (R2007b)

Documentation on how ASSIGNIN works with Simulink's mask workspace is missing from the product manual.

ASSIGNIN is a builtin MATLAB function that has been designed to work with MATLAB workspaces. The mask workspace is not a MATLAB workspace. Hence, when the mask initialization function calls ASSIGNIN, the variable is assigned to the MATLAB base workspace.

In order to read or write mask workspace variables, use SET_PARAM or GET_PARAM with the 'MaskWSVariables' parameter.

MATLAB: How to create a global variable so that all the masked subsystems can see it

There are a couple of ways to create a global variable so that all of your masked subsystems can see it:

1. Set the value of your variable in the Model Initialization callback function of your model. This will place the variable in the base workspace. You can then access this variable throughout your model simply by entering in the variable name.

2. Create a global workspace. To do this, use the GLOBAL function in the Initialization Page of the Mask Editor. For example, if you have a variable 'x' which should be global, use the command 'global x'.

3. Use the EVALIN command. For example, if you have a variable 'k' you would like to be global in a Gain block in your masked subsystem, enter the following command into the Parameters box of the Gain block:

evalin('base','k')

The Gain block will then use the Base workspace, or MATLAB's workspace. Of course, please be sure to define 'k' in the MATLAB workspace.

Best Answer

Related Solutions

MATLAB: Does ASSIGNIN assign a value in the MATLAB base workspace rather than mask workspace when setting a value within the mask initialization callback in Simulink 7.0 (R2007b)

MATLAB: How to create a global variable so that all the masked subsystems can see it

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