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jc_0610: Operator order for multiplication and division block

Sub ID Recommendations

  • NA-MAAB — No recommendations

  • JMAAB — a, b

MATLAB Versions

All

Rule

Sub ID a

The * mark shall be used for the first input to a multiplication and division Product block.

Custom Parameter

Not Applicable

Example — Correct

Example — Incorrect

The / mark is used for the first input.

Sub ID b

The multiplication and division Product block shall not have more than two inputs.

Custom Parameter

Not Applicable

Example — Correct

Example — Incorrect

The block has three inputs.

Rationale

Sub ID a:

  • When checking the block, the input order of the expression and block is reversed, which impairs readability.

  • For floating point numbers, the code is generated according to the operation order in the block -- ((1÷1st input)) × 2nd input. However, if division is performed later, then the number of operations can be reduced.

Sub ID b:

  • The order of operations is clearly defined.

Verification

Model Advisor check: Check operator order of Product blocks (Simulink Check)

Last Changed

R2020a

See Also

Introduced in R2020a