Skip to Main Content Skip to Search
Product Documentation

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.
B

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
See Also

Formulation of Evenly Spaced Breakpoints in the Simulink documentation

Last ChangedR2010b

  

cgsl_0101: Zero-based indexingcgsl_0101: Zero-based indexing cgsl_0103: Precalculated signals and parameterscgsl_0103: Precalculated signals and parameters

Related Products & Applications

Get Simulink trial software

Learn more about Simulink through this collection of videos, articles, technical literature and the Getting Started with Simulink Guide.

Get this Simulink Kit

 © 1984-2012- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS