how to solve this error when i use matlab function

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Simulink does not have enough information to determine output sizes for this block. If you think the errors below are inaccurate, try specifying types
function y = fcn(R1,R2,w,f,l)
y = (1-(R1/R2)^w*exp(1)^(-f*l/R2));
Walter Roberson
Walter Roberson on 23 Jan 2024
function y = fcn(R1,R2,w,f,l)
y = 0;
y = (1-(R1./R2).^w.*exp(-f.*l./R2);
翰旭 on 25 Jan 2024
sorry! i try this code, but the same problem still occurs.

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Answers (1)

Fangjun Jiang
Fangjun Jiang on 22 Jan 2024
Make sure your function is correct. Manually give a numerical example value to obtain the resulting y value.
In the MATLAB Function block editor, click "Edit data" and specify the size of y, for example, 1, or [2,3] or whatever.

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