Difference between revisions of "Hyperbolic spiral"
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A WASSERMANN (talk | contribs) |
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with a real number <math>a</math>. | with a real number <math>a</math>. | ||
| − | < | + | <jsxgraph width="500" height="500"> |
| − | + | var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10]}); | |
| − | + | var a = board.create('slider', [[0,5],[8,5],[0,4,30]],{name:'a'}); | |
| − | + | var c = board.create('curve', [function(phi){return a.Value()/phi; }, [0, 0],0, 8*Math.PI], | |
| − | |||
| − | |||
| − | board = JXG.JSXGraph.initBoard(' | ||
| − | var a = board. | ||
| − | var c = board. | ||
{curveType:'polar', strokewidth:4}); | {curveType:'polar', strokewidth:4}); | ||
| − | </ | + | </jsxgraph> |
| − | |||
===The JavaScript code to produce this picture=== | ===The JavaScript code to produce this picture=== | ||
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| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
<source lang="javascript"> | <source lang="javascript"> | ||
| − | board = JXG.JSXGraph.initBoard(' | + | var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10]}); |
| − | var a = board. | + | var a = board.create('slider', [[0,5],[8,5],[0,4,30]],{name:'a'}); |
| − | var c = board. | + | var c = board.create('curve', [function(phi){return a.Value()/phi; }, [0, 0],0, 8*Math.PI], |
{curveType:'polar', strokewidth:4}); | {curveType:'polar', strokewidth:4}); | ||
</source> | </source> | ||
Latest revision as of 09:29, 8 June 2011
It can be described in polar coordinates [math](r, \theta)[/math] by the equation
- [math]r = \frac{a}{\theta}\,[/math]
with a real number [math]a[/math].
The JavaScript code to produce this picture
var board = JXG.JSXGraph.initBoard('jxgbox', {boundingbox: [-10, 10, 10, -10]});
var a = board.create('slider', [[0,5],[8,5],[0,4,30]],{name:'a'});
var c = board.create('curve', [function(phi){return a.Value()/phi; }, [0, 0],0, 8*Math.PI],
{curveType:'polar', strokewidth:4});
