polyfit

Polynomial curve fitting.

📝 Syntax

• p = polyfit(x, y, n)

📥 Input argument

• x - vector: query points

• y - vector: fitted values at query points

• n - positive scalar: degree of polynomial fit

📤 Output argument

• p - vector: Least-squares fit polynomial coefficients

📄 Description

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

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

🔗 See also

roots, poly.

🕔 History

Version	📄 Description
1.0.0	initial version