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Check array indices

Check ID: mathworks.jmaab_v6.mp_0046

Guideline: mp_0046: How to describe array indices


Checks whether expressions are used to calculate array indices.

The following cases are allowed.

  • Use of the colon operator, :.

  • Addition or subtraction carried out on the last element of an array represented by the end keyword.

This check applies to array indices in the following target components:

  • MATLAB Function blocks in Simulink®.

  • MATLAB® functions in Stateflow® charts.

  • States, transitions, and truth tables in Stateflow MATLAB charts.

  • External MATLAB files referenced in a model.

This check requires a Simulink Check™ license.

Check Parameterization

This check does not include sub-checks because the JMAAB modeling guideline provides only one sub ID.

For reference, the guideline sub ID(s) that are recommended for use by the JMAAB modeling standards organizations are:

  • JMAAB — a

Select Check external .m files referenced in the model, to include .m files referenced by a model in the analysis. The check box is selected by default.

Results and Recommended Actions

ConditionRecommended Action
One or more array indices are calculated using expressions.Rewrite array indices to avoid using expressions other than the use of the colon operator and adding or subtracting from end.

Capabilities and Limitations

  • Analyzes content of library-linked blocks. By default, the input parameter Follow links is set to on.

  • Analyzes content in masked subsystems. By default, the input parameter Look under masks is set to all.

  • Runs on library models.

  • Allows exclusion of blocks and charts.