Cubic spline interpolation: Difference between revisions
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Points can be added by clicking on "Add point". | Points can be added by clicking on "Add point". | ||
<html> | <html> | ||
<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', { | var board = JXG.JSXGraph.initBoard('box', {boundingbox: [-5, 10, 7, -5], axis:true}); | ||
var p = []; | var p = []; | ||
p[0] = board.create('point', [-1,2], { | p[0] = board.create('point', [-1,2], {size: 4, face: 'o'}); | ||
p[1] = board.create('point', [0,-1], { | p[1] = board.create('point', [0,-1], {size: 4, face: 'o'}); | ||
p[2] = board.create('point', [1,0], { | p[2] = board.create('point', [1,0], {size: 4, face: 'o'}); | ||
p[3] = board.create('point', [2,1], { | p[3] = board.create('point', [2,1], {size: 4, face: 'o'}); | ||
var c = board.create('spline', p, {strokeWidth:3}); | var c = board.create('spline', p, {strokeWidth:3}); | ||
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function addPoint() { | function addPoint() { | ||
p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{ | p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{size: 4, face: 'o'})); | ||
board.update(); | board.update(); | ||
} | } | ||
</jsxgraph> | |||
</ | |||
=== References === | === References === | ||
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=== The underlying JavaScript code === | === The underlying JavaScript code === | ||
<source lang="javascript"> | <source lang="javascript"> | ||
var board = JXG.JSXGraph.initBoard('box', { | var board = JXG.JSXGraph.initBoard('box', {boundingbox: [-5, 10, 7, -5], axis:true}); | ||
var p = []; | var p = []; | ||
p[0] = board.create('point', [-1,2], { | p[0] = board.create('point', [-1,2], {size: 4, face: 'o'}); | ||
p[1] = board.create('point', [0,-1], { | p[1] = board.create('point', [0,-1], {size: 4, face: 'o'}); | ||
p[2] = board.create('point', [1,0], { | p[2] = board.create('point', [1,0], {size: 4, face: 'o'}); | ||
p[3] = board.create('point', [2,1], { | p[3] = board.create('point', [2,1], {size: 4, face: 'o'}); | ||
var c = board.create('spline', p, {strokeWidth:3}); | var c = board.create('spline', p, {strokeWidth:3}); | ||
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function addPoint() { | function addPoint() { | ||
p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{ | p.push(board.create('point',[(Math.random()-0.5)*10,(Math.random()-0.5)*3],{size: 4, face: 'o'})); | ||
board.update(); | board.update(); | ||
} | }</source> | ||
</source> | |||
[[Category:Examples]] | [[Category:Examples]] | ||
[[Category:Interpolation]] | |||
Latest revision as of 13:09, 7 June 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', {boundingbox: [-5, 10, 7, -5], axis:true});
var p = [];
p[0] = board.create('point', [-1,2], {size: 4, face: 'o'});
p[1] = board.create('point', [0,-1], {size: 4, face: 'o'});
p[2] = board.create('point', [1,0], {size: 4, face: 'o'});
p[3] = board.create('point', [2,1], {size: 4, face: 'o'});
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],{size: 4, face: 'o'}));
board.update();
}
