Finding polynomials from a set of coordinates
03-12-2017, 01:49 PM
Post: #10
 SlideRule Senior Member Posts: 1,312 Joined: Dec 2013
RE: Finding polynomials from a set of coordinates
(03-11-2017 10:25 AM)grsbanks Wrote:  ... One thing you need to know is that you need n+1 points to fit a polynomial of degree n. Eg. you need 2 points to fit a line (a.x + b = 0), 3 points to fit a quadratic (a.x2 + b.x + c = 0) etc...

Clarification - I always use three or more cartesian coordinates for a curve fit because
a) two coordinates, by DEFINITION, are the end-points of a line segment {either rectilinear or curvilinear}
and
b) a single coordinate fails the basic definition of a line segment.

Alibis?

BEST!
SlideRule
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