| Simulink Reference |
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MATLAB Fcn
Apply a MATLAB function or expression to the input
Library
User-Defined Functions
Description
The MATLAB Fcn block applies the specified MATLAB function or expression to the input. The output of the function must match the output dimensions of the block or an error occurs.
Here are some sample valid expressions for this block.
| Note
This block is slower than the Fcn block because it calls the MATLAB parser during each integration step. Consider using built-in blocks (such as the Fcn block or the Math Function block) instead, or writing the function as an M-file or MEX-file S-function, then accessing it using the S-Function block. |
Data Type Support
A MATLAB Fcn block accepts one complex- or real-valued input of type double and generates real or complex output of type double, depending on the setting of the Output signal type parameter.
Parameters and Dialog Box
- MATLAB function
- The function or expression. If you specify a function only, it is not necessary to include the input argument in parentheses.
- Output dimensions
- Dimensions of the signal output by this block. If the output dimensions are to be the same as the dimensions of the input signal, specify -1. Otherwise, enter the dimensions of the output signal, e.g., 2 for a two-element vector. In either case, the output dimensions must match the dimensions of the value returned by the function or expression in the MATLAB function field.
- Output signal type
- The dialog allows you to select the output signal type of the MATLAB Fcn as
real, complex, or auto. A value of auto sets the block's output type to be the same as the type of the input signal.
- Collapse 2-D results to 1-D
- Outputs a 2-D array as a 1-D array containing the 2-D array's elements in column-major order.
Characteristics
Direct Feedthrough
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Yes
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Sample Time
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Inherited from driving block
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Scalar Expansion
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N/A
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Dimensionalized
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Yes
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Zero Crossing
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No
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| | Math Function | | Matrix Concatenation | |