Least-squares line fitting: Difference between revisions

Revision as of 19:41, 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 14: / Line 14: @@
 for (i=0;i<1000;i++) {
    xr = 10*(Math.random()-0.5);
-   yr = 0.3*xr+delta*(Math.random()-0.5) +1.0;
+   yr = 0.*xr+delta*(Math.random()-0.5) +1.0;
    p.push(brd.create('point',[xr, yr], {withLabel:false}));
 }