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Model nonlinearity with lookup tables, approximate mathematical functions by mapping input values to output values

If you are new to modeling nonlinearity, first try using a lookup table block. Lookup table blocks use arrays of data to map input values to output values, approximating mathematical functions. To approximate a function in N variables, use the n-D Lookup Table block:

To manage the lookup tables in your environment, consider using the Lookup Table Editor. Watch How to Use the Lookup Table Editor (5min 9sec).


1-D Lookup TableApproximate one-dimensional function
2-D Lookup TableApproximate two-dimensional function
Direct Lookup Table (n-D)Index into n-dimensional table to retrieve element, vector, or 2-D matrix
Interpolation Using PrelookupUse precalculated index and fraction values to accelerate approximation of N-dimensional function
Lookup Table DynamicApproximate a one-dimensional function using dynamic table
n-D Lookup TableApproximate n-dimensional function
PrelookupCompute index and fraction for Interpolation Using Prelookup block
Sine, CosineImplement fixed-point sine or cosine wave using lookup table approach that exploits quarter wave symmetry


Simulink.LookupTableStore and share lookup table and breakpoint data, configure data for ASAP2 and AUTOSAR code generation
Simulink.BreakpointStore and share data for a breakpoint set, configure the data for ASAP2 and AUTOSAR code generation
Simulink.lookuptable.EvenspacingConfigure even spacing set data for lookup table object
Simulink.lookuptable.TableConfigure table data for lookup table object
Simulink.lookuptable.BreakpointConfigure breakpoint set data for lookup table object
Simulink.lookuptable.StructTypeInfoConfigure settings for structure type that lookup table object uses in the generated code


lookupTableEditorStart Lookup Table Editor (Since R2022a)


About Lookup Tables

Work with Lookup Tables

Update Lookup Tables from Previous Release