I am using matlab function block inside model simulink, when I run model fcn gives this error message,

Expected either a logical, char, int, fi, single, or double. Found a MATLAB type. MATLAB types are returned from calls to the MATLAB interpreter and are not supported inside expressions. They may only be used on the right-hand side of assignments and as arguments to MATLAB calls.

Function 'MATLAB Function' (#295.250.252), line 9, column 4:

[Azzi Abdelmalek]

What is in your function?

Answer 1

[Kaustubha Govind]

You need to pre-declare the size/type of the variable which is supposed to be calculated by an extrinsic function (an extrinsic function is a function that is not in the list of Functions Supported for Code Generation). Please see Converting mxArrays to Known Types.

[Prateek Tiwari]

@Kaustubha

What if I do not know the size before hand?