Definición de función
R2026bExisten consideraciones especiales cuando se crean funciones de MATLAB® cuyo uso está destinado a un bloque MATLAB Function. Estas incluyen determinadas restricciones al utilizar varargin y varargout, funciones recursivas, funciones anónimas y funciones anidadas. Para generar código para las funciones recursivas de MATLAB, el generador de código utiliza recursividad en tiempo de compilación o recursividad en tiempo de ejecución. Para generar código C/C++ eficiente, el generador de código puede crear múltiples versiones de una función, denominadas especializaciones de la función. En algunos casos, puede evitar que el generador de código cree especializaciones de la función mediante coder.ignoreSize y coder.ignoreConst. Puede omitir la generación de código para una función específica en su código de MATLAB y utilizar, en su lugar, el motor de MATLAB para ejecutar una llamada. Para ello, utilice la construcción coder.extrinsic.
Bloques
 | MATLAB Function | Include MATLAB code in Simulink models |
 | MATLAB System | Include System object in model |
Funciones
coder.extrinsic | Declare extrinsic function |
coder.ignoreSize | Prevent code generator from creating function specializations for constant-size expressions |
coder.ignoreConst | Prevent use of constant value of expression for function specializations |
coder.mustBeConst | Validate that value is a compile-time constant (Desde R2023b) |
coder.unroll | Unroll for-loop by making a copy of
the loop body for each loop iteration |
coder.sameSizeBinaryOp | Apply element-wise binary operations without implicit expansion |
coder.noImplicitExpansionInFunction | Disable implicit expansion within the specified function in the generated code |
coder.read | Read data files at run time in generated code (Desde R2023a) |
coder.write | Create data files that the generated code reads at run time (Desde R2023a) |
Temas
- Effects of Implicit Expansion on Generated Code (MATLAB Coder)
Implicit expansion in the generated code can affect output sizes, code size, and performance.
- Control Implicit Expansion in Generated Code (MATLAB Coder)
Disable implicit expansion globally, for specific functions, or for specific operations.
- Generate Code for arguments Block That Validates Input and Output Arguments (MATLAB Coder)
Generate code for MATLAB code that constrains class, size, and other aspects of function input and output values.
- Code Generation for Recursive Functions (MATLAB Coder)
Use recursive functions in MATLAB code that is intended for code generation.
- Code Generation for Nested and Anonymous MATLAB Functions (MATLAB Coder)
Restrictions apply when you use nested or anonymous functions in MATLAB code intended for code generation.
- Using Extrinsic Functions (MATLAB Coder)
Use MATLAB to execute a function call in the generated code.
- Working With mxArray Outputs in Generated Code (MATLAB Coder)
Handle the
mxArrayobjects returned by extrinsic functions.
Solución de problemas
Resolve Error: Nonconstant Index into varargin or varargout (MATLAB Coder)
Troubleshoot error when the code generator cannot determine the value of an index
into varargin or varargout inside a
for-loop.
Troubleshoot Replicated Functions in Generated Code (MATLAB Coder)
Troubleshoot duplicate functions in the generated code.
Resolve Error: Output Variable Must Be Assigned Before Run-Time Recursive Call (MATLAB Coder)
Troubleshoot error when the MATLAB code does not assign a value to an output variable before a recursive call.
Resolve Error: Compile-Time Recursion Limit Reached (MATLAB Coder)
Troubleshoot error when recursion during code generation exceeds the limit.
Resolve Error: Arrays Have Incompatible Sizes (MATLAB Coder)
Troubleshoot size incompatibility errors that occur during code generation.
