Semicubical parabola: Difference between revisions

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var p = brd.create('curve',
var p = brd.create('curve',
             [function(t){ return t*t;},
             [function(t){ return t*t;},
               function(t){ return a.Value()*t*t*t;}
               function(t){ return a.Value()*t*t*t;},
              -2, 2
             ],
             ],
             {strokeWidth:2, strokeColor:'black'});
             {strokeWidth:2, strokeColor:'black'});

Revision as of 09:33, 13 January 2011

A semicubical parabola is a curve defined parametrically as

[math]\displaystyle{ x = t^2 }[/math]
[math]\displaystyle{ y = at^3 }[/math]

References

The underlying JavaScript code

var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-1,2,3,-2], keepaspectratio:true, axis:true});
brd.suspendUpdate();
var a = brd.create('slider',[[-1,1.8],[1,1.8],[-5,0.20,5]], {name:'a'});

var p = brd.create('curve',
             [function(t){ return t*t;},
              function(t){ return a.Value()*t*t*t;}
             ],
             {strokeWidth:2, strokeColor:'black'});
brd.unsuspendUpdate();