Accessing Elements of an output of an extrinsic call

Question

Hossein Rezazadeh 2018-11-4

0
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https://ww2.mathworks.cn/matlabcentral/answers/427843-accessing-elements-of-an-output-of-an-extrinsic-call

回答： madhan ravi 2018-11-5

I am trying to assign to output of an extrinsic call. I know I have to initialize it prior to the extrinsic call. In my case the extrinsic function returns an object. I tried to pre-initialize with a structure similar to that object.

        coder.extrinsic('operspec');
        op=StructOpspec(); % Constructing a structure with the same feilds and types of operspec output;
        op = operspec(plant_mdl);

But it complains: "MATLAB expression 'operspec' is not of the correct class: expected 'struct', found 'opcond.OperatingSpec'