Default function array layout

Default input array data for custom code functions

Model Configuration Pane: Simulation Target

Description

The Default function array layout parameter specifies how input array data is handled by external C/C++ functions and class methods. This parameter affects C/C++ functions and methods called by C Caller, C Function, MATLAB Function, and MATLAB System blocks and Stateflow^® charts.

Settings

not specified | column-major | row-major | any

Column-major

External C/C++ functions and class methods assume input array data is in column-major layout.

Row-major

External C/C++ functions and class methods assume input array data is in row-major layout.

Any

External C/C++ functions and class methods are indifferent about input data array layout. If your external function and class method algorithms do not require the matrix data to be in a specific array layout, for example if they perform only element-wise operations on input array data, use this option.

Not specified

External C/C++ functions and class methods make no assumption about input data array layout. However, if Array layout (Simulink Coder) is set to Row-major, Simulink^® reports an error. You can turn off the error by changing the External functions compatibility for row-major code generation (Simulink Coder) to warning or none.

The Default function array layout parameter controls the default array layout of custom code functions and class methods. To specify array layout for individual functions or class methods, click Exception by function.

Recommended Settings

Application	Setting
Debugging	No impact
Traceability	No impact
Efficiency	No recommendation
Safety precaution	No recommendation

Programmatic Use

Parameter: DefaultCustomCodeFunctionArrayLayout

Type: character vector

Value: "Column-major" | "Row-major" | "Any" | "NotSpecified"

Default: "NotSpecified"

Version History

Introduced in R2020b