Least-squares line fitting: Difference between revisions

Revision as of 11:49, 7 November 2010

This little JXSGraph application finds the line - described by homogeneous coordinates [a,b,c] - that minimizes

[math]\displaystyle{ \sum_{i=1}^n (ax_i+by_i+cz_i)^2. }[/math]

Coming soon...

@@ Line 23: / Line 23: @@
 n = p.length;
 for (i=0;i<n;i++) {
-     M.push([1,0,p[i].X(), p[i].Y(), 1.0]);
+     M.push([1.0,p[i].X(), p[i].Y(), 1.0]);
      y.push(1+p[i].X()*p[i].X() + p[i].Y()*p[i].Y());
 }