When you simulate or build a Simulink® model that contains MATLAB Function blocks, Simulink generates a report for each MATLAB Function block in your model. Use the report to debug your MATLAB® functions and verify that they are suitable for code generation. The report provides type information for the variables and expressions in your functions. This information helps you to find sources of error messages and to understand type propagation rules.
Stateflow® produces one report for each Stateflow chart, regardless of the number of MATLAB functions it contains.
If you have identical MATLAB Function blocks in your model, for example, one in a library and one in the model, a single report is generated for the identical blocks.
Use one of these methods:
In the MATLAB Function Block Editor, select View Report.
If compilation errors occur, in the Diagnostic Viewer window,
View errors and warnings on the All Messages tab. To highlight the source code for an error or warning, click the message. It is best practice to address the first message in the list, because often subsequent errors and warnings are related to the first message.
In the MATLAB Source pane, the Function List view organizes functions according to the containing file. To visualize functions according to the call structure, use the Call Tree view.
To view a function in the code pane of the report, click the function. To edit the function, click Edit in MATLAB. A function that is in the MATLAB Function block opens in the MATLAB Function Block Editor. Other functions open in the MATLAB Editor.
To view a MATLAB function in the code pane, click the function in the MATLAB Source pane. To see information about the type of a variable or expression, pause over the variable or expression.
In the code pane, syntax highlighting of MATLAB source code helps you to identify MATLAB syntax elements. Syntax highlighting also helps you to identify certain code generation attributes such as whether a function is extrinsic or whether an argument is constant.
In the MATLAB code, the report identifies an extrinsic function with purple text. The information window indicates that the function is extrinsic.
In the MATLAB code, orange text indicates a compile-time constant argument to an entry-point function or a specialized function. The information window includes the constant value.
Knowing the value of the constant arguments helps you to understand generated function signatures. It also helps you to see when code generation created function specializations for different constant argument values.
To export the value to a variable in the workspace, click .
The Variables tab provides information about the variables for the selected MATLAB function. To select a function, click the function in the MATLAB Source pane.
The variables table shows:
Class, size, and complexity
Properties of fixed-point types
This information helps you to debug errors, such as type mismatch errors, and to understand type propagation.
This table describes symbols, badges, and other indicators in the variables table.
|Column in the Variables Table||Indicator||Description|
|Name||expander||Variable has elements or properties that you can see by clicking the expander.|
|Name||Heterogeneous cell array (all elements have the same properties)|
|Name||nth element of a heterogeneous cell array|
|Size||Variable-size dimension with an upper bound of n|
|Size||Variable-size with no upper bound|
|Size||italics||Variable-size array whose dimensions do not change size during execution|
To see the fixed-point properties, click the badge.
The variables table does not show individual elements of
The report does not show full information for unrolled loops. It displays data types of one arbitrary iteration.
The report does not show information about dead code.