Is there a way to get MATLAB Function name defined in Simulink block programmatically ?

• I would like to know whether the MATLAB Function block created in Simulink can be programatically check or parameters of the function can be obtained.
• For example

y = fcn(u) or y = FunctionName(u)

I would like to get the function name fcn or FunctionName

[Steven Lord]

How are you hoping to use this information if it's available? What are you planning to use it for?

[Shiva Haresh]

It's for a custom Simulink Check

Answer 1

[Paul]

Finding the function line is easy because it's the first line that starts with "function". Just need to deal with the different possibilities for the function signature.

For example, to find the function line

config = get_param(gcb,'MatlabFunctionConfiguration');
fline = strip(split(string(config.FunctionScript),newline));
fline = fline(startsWith(fline,"function"))
fline = fline(1);

fline =

"function img = fcn(lambd,m,n)"

% assign to fline here to see rest of processing to find the function name
fline = "function img = fcn(lambd,m,n)";
% this logic for typical signature: function (outputlist) = fcn (inputlist)
if contains(fline,"=")
    fline = extractAfter(fline,"=")
    if contains(fline,"(")
        function_name = strip(extractBefore(fline,"("))
    end
end

fline = " fcn(lambd,m,n)"

function_name = "fcn"

Would need to implement logic for all possible function signatures.

[Shiva Haresh]

Thank you so much @Paul

Answer 2

[Fangjun Jiang]

myconfig = get_param(gcb, 'MATLABFunctionConfiguration') and parse the text, you might be able to get it.

web(fullfile(docroot, 'simulink/slref/simulink.matlabfunction.matlabfunctionconfiguration.html'))

[Shiva Haresh]

I tried this already but I couldn't get the function name as output.

for example,

• system = load_system('sacv.slx');
• x = get_param(gcb, 'MATLABFunctionConfiguration');

Did I miss another step here?

[Fangjun Jiang]

You need to parse x.FunctionScript

The function name shows up on the icon and it changes as the user changes the function name. So I think it's already been parsed but I couldn't find it through block properties or 'MATLABFunctionConfiguration'

[Shiva Haresh]

But this FunctionScript has the entire input and output along with the function name.

[Shiva Haresh]

Thank you so much @Fangjun Jiang