MATLAB: How to create a mask for the subsystem where each parameter depends on the other parameters in the mask

simulink

I have three parameters in my mask 'a','b','c'. When any of the parameter is changed manually the other parameters must change automatically according to my algorithm. I have placed my algorithm as a callback for all three parameters so that it will be called whenever any of the parameters change. However, this gives rise to recursive behavior of the mask which leads to erroneous results.

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Execution of a mask parameter callback when the mask dialog box opens is intended behavior. The callbacks execute when the dialog first opens, allowing Simulink to initialize the dialog properly. Note that mask parameter callbacks are typically used to manipulate the enabled and visible states of mask parameters in dynamic dialogs

In cases where the mask callbacks lead to recursive behavior it is best to change the design of the mask. The original design can lead to recursive calls which can be very error prone. A better design would be to have the user choose which variable they would like to update and calculate the other variables inside the mask. An example is attached.

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MATLAB: How to pass the mask parameter to a goto block underneath and to the GotoTag parameter in Simulink 8.0 (R2012b)

With respect to the modifying GOTO tag names, using Mask Parameters, I am attaching a SLX file here.

SLX file : MathWorksTS_ExampleMaskParameter_for_Goto.slx which has two subsystems 'Subsystem' and 'Subsystem1'.

'Subsystem' demonstrates usage of 'set_param' along with a Dialog Callback of the Dialog Parameter for 'GOTO_NAME'. The callback is in 'MaskDialogCallback.m' script in the ZIP folder. The script changes the 'GotoTag' of the Goto block with the provided string value.

The 'MaskDialogCallback.m' script should have the following code:

blk = gcb;
GotoTagString = get_param(blk,'GOTO_NAME');
set_param([gcb '/Goto'],'GotoTag',GotoTagString)

Please note, usage of 'set_param' might not be the ideal scenario, because it might lead to possible conflicts and hence it is not recommended to use 'set_param' for blocks under the mask.

Another option is if you know of all possible 'Goto' blocks then can use a Switch Case in the Mask Dialog to select one of the Goto block. The 'Subsystem1' demonstrates this workflow. Edit the mask to understand the workflow. The different Goto blocks are inside the 'Switch Case Action Subsystem' blocks. This is a recommended workflow if you are aware of all available goto blocks.

MATLAB: How to change what parameters are visible in a masked block dialogue box

When you are creating the mask, right click on the block and choose "edit MASK" then in the "Parameters" pane of the "Mask Editor" you will see your parameters defined. When you click on each of the parameters, you can deinf e callback function for each of the parameters by writing an m-file's name in Dialog callback. Or you can just simply write pieces of code there in Dialog callback. This code runs as a callback for that parameter.

In that code you can change the visibility of the mask parameters(as well as enabling or disabling them) with commands like this:

     set_param(gcb,'MaskVisibilities',{'on';'off'})

where I make the first parameter visible but the second one invisible, and

     set_param(gcb,'MaskEnables',{'on';'off'})

where I make the first parameter enabled but the second one disabled.

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Related Solutions

MATLAB: How to pass the mask parameter to a goto block underneath and to the GotoTag parameter in Simulink 8.0 (R2012b)

MATLAB: How to change what parameters are visible in a masked block dialogue box

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