# Difference between revisions of "Cubic spline interpolation"

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Points can be added by clicking on "Add point". | Points can be added by clicking on "Add point". | ||

<html> | <html> | ||

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<form><input type="button" value="Add point" onClick="addPoint()"></form> | <form><input type="button" value="Add point" onClick="addPoint()"></form> | ||

− | < | + | </html> |

− | + | <jsxgraph width="600" height="400" box="box"> | |

var board = JXG.JSXGraph.initBoard('box', {originX: 250, originY: 250, unitX: 50, unitY: 25, axis:true}); | var board = JXG.JSXGraph.initBoard('box', {originX: 250, originY: 250, unitX: 50, unitY: 25, axis:true}); | ||

var p = []; | var p = []; | ||

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} | } | ||

− | </ | + | </jsxgraph> |

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=== References === | === References === |

## Revision as of 11:26, 25 March 2011

Constructs a cubic spline through given points. Points can be added by clicking on "Add point".

### References

### The underlying JavaScript code

```
var board = JXG.JSXGraph.initBoard('box', {originX: 250, originY: 250, unitX: 50, unitY: 25, axis:true});
var p = [];
p[0] = board.create('point', [-1,2], {style:6});
p[1] = board.create('point', [0,-1], {style:6});
p[2] = board.create('point', [1,0], {style:6});
p[3] = board.create('point', [2,1], {style:6});
var c = board.create('spline', p, {strokeWidth:3});
var g = board.create('glider', [1.5,0,c], {name:'',style:8});
var t = board.create('tangent', [g], {dash:2,strokeColor:'#aa0000'});
function addPoint() {
p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{style:6}));
board.update();
}
```