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cgsl_0102: Evenly spaced breakpoints in lookup tables

ID: Titlecgsl_0102: Evenly spaced breakpoints in lookup tables
DescriptionWhen you use Lookup Table and Prelookup blocks,
AWith non-fixed-point data types, use evenly spaced data breakpoints for the input axis
BWith fixed-point data types, use power of two spaced breakpoints for the input axis
NotesEvenly spaced breakpoints can prevent generated code from including division operations, resulting in faster execution.
RationaleA Improve ROM usage and execution speed.

Improve execution speed.

When compared to unevenly spaced data, power-of-two data can

  • Increase data RAM usage if you require a finer step size

  • Reduce accuracy if you use a coarser step size

Compared to an evenly spaced data set, there should be minimal cost in memory or accuracy.

Model Advisor ChecksEmbedded Coder > Identify questionable fixed-point operations

For check details, see Identify questionable fixed-point operations (Embedded Coder).

See Also

Formulation of Evenly Spaced Breakpoints in the Simulink® documentation

Last ChangedR2010b

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