MATLAB: Adding a masked subsytem to a model from script.

MATLABsimulink

I am writing a program that automates the building of a simulink system. However when I try the following command:

add_block('built-in/Compare To Constant',[sys,'/compare'],'relop','~=','const','realmax(single)','Position',[100 275 200 325])

I get an error stating that a block compare to constant block doesn't exist. After digging a little I discovered that compare to constant is actually a masked subsystem. So my question is is there a way to add compare to constant, or a similar masked subsystem block, to a model from script directly or do I need to re-create the subsystem and then mask it in the code?

Best Answer

This is a little tricky. Right click the Simulink library at the library browser, choose 'Open the Simulink library'. Then double click the "Logical and Bit operations", select the "Compare to Constant" block.

Go to MATLAB Command Window, type source=gcb, you will see the full path of the block. It contains carriage returns.

Assume you have a new model called "untitled" open, run the line and you will see the block added.

add_block(source,'untitled/block')

Related Solutions

MATLAB: I am unable to use the ADD_BLOCK function with particular blocks in the Model Verification library in Simulink 6.4 (R2006a)

Note that you can use 'built-in/BlockType' as an input argument to the ADD_BLOCK function to represent a source block, where 'BlockType' is the built-in block's type. However, the ADD_BLOCK function allows this syntax only for blocks that are

available in Simulink block libraries
not masked subsystems

Otherwise, you must specify the source block using its full pathname, e.g., as returned by the GCB function. Note that the full pathname often includes spaces and new line characters that you must represent in the ADD_BLOCK input argument string.

For example, to add the Check Dynamic Upper Bound block to your model, enter the following at the MATLAB prompt:

blkName = sprintf('simulink/Model\nVerification/Check Dynamic \nUpper Bound');
addblock(blkName,'mymodel/CDUB2')

MATLAB: Adding a subsystem using an m file

You can do that. The easiest way to do is to add your Subsystem block first.

add_block('built-in/Subsystem','/Subsystem1')

And then add all the other blocks you want by specifying the destination.

add_block('built-in/Constant','/Subsystem1/MyConstant')

Best Answer

Related Solutions

MATLAB: I am unable to use the ADD_BLOCK function with particular blocks in the Model Verification library in Simulink 6.4 (R2006a)

MATLAB: Adding a subsystem using an m file

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