Least-squares line fitting: Difference between revisions

Revision as of 19:43, 5 November 2010

This little JXSGraph application finds the line - described by homogeneous coordinates [a,b,1] - that minimizes

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

@@ Line 12: / Line 12: @@
 // points from the line.
 brd.suspendUpdate();
-for (i=0;i<1000;i++) {
+for (i=0;i<5;i++) {
    xr = 10*(Math.random()-0.5);
    yr = 0.*xr+delta*(Math.random()-0.5) +1.0;