Programmatically change MATLAB Fcn Block Function Configuration Script

I'm hoping to programmatically change the Function Script for a MATLAB Fcn Block

currentScript = 'function y = fcn(u, value)';
config = get_param(mFcnBlock, 'MATLABFunctionConfiguration');
config.FunctionScript = currentScript;

My code is as shown above, and this works as intended. The result is:

function y = fcn(u, value)

How would I change the currentScript to be the following?

function y = fcn(u, value)

switch u
    case true
        y = value;
    case false
        y = 0;
    otherwise 
        y = nan;
end

I've tried several ways, but the function script almost always ends up as the following:

function y = fcn(u, value,switch,ucase,truey,  value1,case,false,y,     otherwise, y1,  nan,end)

Thanks!

Answer 1

[Paul]

Hi Aarish,

This worked for me.

config = get_param(gcb,'MATLABFunctionConfiguration'); % Matlab Fcn block selected in Simulink diagram

new_script = ...
"function y = fcn(u, value)" + newline + ...
"switch u"                   + newline + ...
"    case true"              + newline + ...
"       y = value;"          + newline + ...
"    case false"             + newline + ...
"       y = 0;"              + newline + ...
"    otherwise"              + newline + ... 
"       y = nan;"            + newline + ...
"end";

config.FunctionScript = new_script;

If you don't mind me asking, what is the use case for wholesale change of the function code progrmatically?

Answer 2

[Aaryan]

how to add a new function to the same block?

like function x = fcn(u,v)