WOLFRAM SYSTEM MODELER
fittingComputes the coefficients of a polynomial that fits a set of data points in a least-squares sense |
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Wolfram Language
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SystemModel["Modelica.Media.Incompressible.TableBased.Polynomials_Temp.fitting"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Polynomials.fitting(u,y,n) computes the coefficients of a polynomial p(u) of degree "n" that fits the data "p(u[i]) - y[i]" in a least squares sense. The polynomial is returned as a vector p[n+1] that has the following definition:
p(u) = p[1]*u^n + p[2]*u^(n-1) + ... + p[n]*u + p[n+1];
Syntax
p = fitting(u, y, n)
Inputs (3)
| u |
Type: Real[:] Description: Abscissa data values |
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| y |
Type: Real[size(u, 1)] Description: Ordinate data values |
| n |
Type: Integer Description: Order of desired polynomial that fits the data points (u,y) |
Outputs (1)
| p |
Type: Real[n + 1] Description: Polynomial coefficients of polynomial that fits the date points |
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