polyfit¶
- numeric.fitting.polyfit(x, y, degree, func=False)¶
Polynomail fitting.
- Parameters
x – (array_like) x data array.
y – (array_like) y data array.
degree – (int) Degree of the fitting polynomial.
func – (boolean) Return fit function (for predict function) or not. Default is
False
.
- Returns
Fitting parameters and function (optional).
Examples:
from mipylib.numeric import fitting x = linspace(0, 4*pi, 10) y = sin(x) #Plot data points plot(x, y, 'ro', fill=False, size=1) #Use polyfit to fit a 7th-degree polynomial to the points r = fitting.polyfit(x, y, 7) #Plot fitting line xx = linspace(0, 4*pi, 100) p = r[0] yy = fitting.polyval(p, xx) plot(xx, yy, '-b') title('Polynomial fitting example')