Polynomial

R2026b

Perform evaluation of polynomial coefficients on input values

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Polynomial block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simulink / Math Operations

Description

The Polynomial block evaluates P(u) at each time step for the input u. You define a set of polynomial coefficients in the form that the MATLAB^® polyval command accepts.

Examples

Model a Digital Thermometer Using the Polynomial Block

How the ex_sldemo_boiler model uses the Polynomial block.

• Open Model

Ports

Input

Port_1 — Input signal

real scalar or vector

Value at which to evaluate the polynomial P(u).

Data Types: single | double

Output

Port_1 — Evaluated polynomial value

real scalar or vector

Value of the polynomial P(u) evaluated at the input signal.

Data Types: single | double

Parameters

Polynomial coefficients — Coefficients of polynomial to be evaluated

[ +2.081618890e-019, -1.441693666e-014, +4.719686976e-010, -8.536869453e-006, +1.621573104e-001, -8.087801117e+001 ] (default) | real array

Specify polynomial coefficients in MATLAB polyval form. The first coefficient corresponds to x^N and the remaining coefficients correspond to decreasing orders of x. The last coefficient represents the constant for the polynomial.

Programmatic Use

Block Parameter: coefs

Type: real array

Default: [ +2.081618890e-019, -1.441693666e-014, +4.719686976e-010, -8.536869453e-006, +1.621573104e-001, -8.087801117e+001 ]

Block Characteristics

Data Types	double | single
Direct Feedthrough	yes
Multidimensional Signals	no
Variable-Size Signals	no
Zero-Crossing Detection	no

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"simulink/Math Operations/Polynomial"

Example: add_block("simulink/Math Operations/Polynomial","myModel/myBlock",MakeNameUnique="on")

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

PLC Code Generation
Generate Structured Text code using Simulink® PLC Coder™.

Version History

Introduced before R2006a