Least-squares line fitting: Difference between revisions

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<jsxgraph width="600" height="600">
<jsxgraph width="600" height="600">
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5], keepaspectratio:true, axis:true});
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5], keepaspectratio:true, axis:true});
var i, p = [], angle, xr, yr, delta = 0.1;
var i, p = [], angle, xr, yr, delta = 0.0;


// Random points are constructed which lie roughly on a line
// Random points are constructed which lie roughly on a line
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brd.create('circle',[ [xm,ym], r]);  
brd.create('circle',[ [xm,ym], r]);  
alert([xm,ym,r].toString());
/*
/*
// Having constructed the points, we can fit a line described  
// Having constructed the points, we can fit a line described  

Revision as of 11:17, 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...