Continuous function II: Difference between revisions
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<jsxgraph width="600" height="500" box="box"> | <jsxgraph width="600" height="500" box="box"> | ||
board = JXG.JSXGraph.initBoard('box', {originX: 50, originY: 400, unitX: 50, unitY: 50}); | board = JXG.JSXGraph.initBoard('box', {originX: 50, originY: 400, unitX: 50, unitY: 50}); | ||
b1axisx = board.create('axis', [[0,0], [1,0]], {}); | b1axisx = board.create('axis', [[0,0], [1,0]], {}); | ||
b1axisy = board.create('axis', [[0,0], [0,1]], {}); | b1axisy = board.create('axis', [[0,0], [0,1]], {}); | ||
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y1 = board.create('glider', [0,3,b1axisy],{name:'f(a)'}); | y1 = board.create('glider', [0,3,b1axisy],{name:'f(a)'}); | ||
board.suspendUpdate(); | |||
y2 = board.create('point', [0,function(){return y1.Y()-s.Value();}],{style:7,name:' '}); | y2 = board.create('point', [0,function(){return y1.Y()-s.Value();}],{style:7,name:' '}); | ||
y3 = board.create('point', [0,function(){return y1.Y()+s.Value();}],{style:7,name:' '}); | y3 = board.create('point', [0,function(){return y1.Y()+s.Value();}],{style:7,name:' '}); | ||
Revision as of 10:29, 25 March 2011
References
The underlying JavaScript code
board = JXG.JSXGraph.initBoard('box', {originX: 50, originY: 400, unitX: 50, unitY: 50});
board.suspendUpdate();
b1axisx = board.create('axis', [[0,0], [1,0]], {});
b1axisy = board.create('axis', [[0,0], [0,1]], {});
var f = function(x) { return 1.0/x; };
graph = board.create('functiongraph', [f,0.00001, 15], {strokeColor:'#00ff00'});
s = board.create('slider', [[0,-1],[4,-1],[0,1,1]],{name:'ε'});
y1 = board.create('glider', [0,3,b1axisy],{name:'f(a)'});
y2 = board.create('point', [0,function(){return y1.Y()-s.Value();}],{style:7,name:' '});
y3 = board.create('point', [0,function(){return y1.Y()+s.Value();}],{style:7,name:' '});
z1 = board.create('point', [function(){return f(y1.Y());},function(){return y1.Y();}],{style:7,name:'f(a)'});
z2 = board.create('point', [function(){return f(y2.Y());},function(){return y2.Y();}],{style:7,name:' '});
z3 = board.create('point', [function(){return f(y3.Y());},function(){return y3.Y();}],{style:7,name:' '});
v1 = board.create('line', [z1,y1],{strokeColor:'gray',dash:2,strokeWidth:1,straightFirst:false,straightLast:false});
v2 = board.create('line', [z2,y2],{strokeColor:'gray',dash:2,strokeWidth:1});
v3 = board.create('line', [z3,y3],{strokeColor:'gray',dash:2,strokeWidth:1});
h1 = board.create('curve', [function(t){return z1.X();},function(t){return t},0,20], {strokeColor:'gray',dash:2,strokeWidth:1});
h2 = board.create('curve', [function(t){return z2.X();},function(t){return t},0,20], {strokeColor:'gray',dash:2,strokeWidth:1});
h3 = board.create('curve', [function(t){return z3.X();},function(t){return t},0,20], {strokeColor:'gray',dash:2,strokeWidth:1});
board.unsuspendUpdate();
