Level-2 MATLAB S-Function

Use Level-2 MATLAB S-function in model


User-Defined Functions


This block allows you to use a Level-2 MATLAB® S-function (see Write Level-2 MATLAB S-Functions) in a model. To do this, create an instance of this block in the model. Then enter the name of the Level-2 MATLAB S-function in the S-function name field of the block's parameter dialog box.

    Note:   Use the S-Function block to include a Level-1 MATLAB S-function in a block.

If the Level-2 MATLAB S-function defines any additional parameters, you can enter them in the Parameters field of the block's parameter dialog box. Enter the parameters as MATLAB expressions that evaluate to their values in the order defined by the MATLAB S-function. Use commas to separate each expression.

If a model includes a Level-2 MATLAB S-Function block, and an error occurs in the S-function, the Level-2 MATLAB S-Function block displays MATLAB stack trace information for the error in a dialog box. Click OK to close the dialog box.

Data Type Support

Depends on the MATLAB file that defines the behavior of a particular instance of this block.

Parameters and Dialog Box

S-function name

Specify the name of a MATLAB function that defines the behavior of this block. The MATLAB function must follow the Level-2 standard for writing MATLAB S-functions (see Write Level-2 MATLAB S-Functions for details).


Specify values of the parameters of this block.


Data Types

Double | Single | Boolean | Base Integer | Fixed-Point

Sample Time

Depends on the MATLAB S-function

Direct Feedthrough

Depends on the MATLAB S-function

Multidimensional Signals


Variable-Size Signals


Zero-Crossing Detection


Code Generation


Introduced in R2010b

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