<< polyder

Polynomials

polyint >>

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polyfit

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Polynomial curve fitting.

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Syntax

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p = polyfit(x, y, n)

Input argument

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x

vector: query points

y

vector: fitted values at query points

n

positive scalar: degree of polynomial fit

Output argument

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p

vector: Least-squares fit polynomial coefficients

Description

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p = polyfit(x, y, n) returns the coefficients for a polynomial p(x) of degree n that is a best fit for the data in y.

Example

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x = linspace(0, 8 * pi, 15);
y = sin(x);
p = polyfit(x, y, 7)

See also

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roots, poly.

History

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Version	Description
1.0.0	initial version

Author

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Allan CORNET