FitPoly Command

FitPoly( <List of Points>, <Degree of Polynomial> ): Calculates the polynomial regression model of given degree that fits the specified points.

FitPoly({(-1, -1), (0, 1), (1, 1), (2, 5)}, 3) yields f(x) = x³ - 1 x² + 1.

FitPoly( <Freehand Function>, <Degree of Polynomial> ): Calculates the polynomial regression model of given degree that fits a function drawn using the Freehand Shape Tool.

To obtain a polynomial of degree n the list must contain at least n + 1 points.
See also FitExp Command, FitLog Command, FitPow Command and FitSin Command.
When working with big/small numbers, consider normalizing them for a more accurate result. See Normalize Command.

CAS Syntax

FitPoly( <List of Points>, <Degree of Polynomial> ): Calculates the polynomial regression model of given degree that fits the specified points.

FitPoly({(-1, -1), (0, 1), (1, 1), (2, 5)}, 3) yields x³ - x² + 1.