Difference between revisions of "Continuous function II"
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Line 1: | Line 1: | ||
<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}); | + | var board = JXG.JSXGraph.initBoard('box', {originX: 50, originY: 400, unitX: 50, unitY: 50}); |
− | b1axisx = board.create('axis', [[0,0], [1,0]], {}); | + | var b1axisx = board.create('axis', [[0,0], [1,0]], {}); |
− | b1axisy = board.create('axis', [[0,0], [0,1]], {}); | + | var b1axisy = board.create('axis', [[0,0], [0,1]], {}); |
var f = function(x) { return 1.0/x; }; | var f = function(x) { return 1.0/x; }; | ||
− | graph = board.create('functiongraph', [f,0.00001, 15], {strokeColor:'#00ff00'}); | + | var graph = board.create('functiongraph', [f,0.00001, 15], {strokeColor:'#00ff00'}); |
− | s = board.create('slider', [[0,-1],[4,-1],[0,1,1]],{name:'ε'}); | + | var s = board.create('slider', [[0,-1],[4,-1],[0,1,1]],{name:'ε'}); |
− | y1 = board.create('glider', [0,3,b1axisy],{name:'f(a)'}); | + | var y1 = board.create('glider', [0,3,b1axisy],{name:'f(a)'}); |
board.suspendUpdate(); | board.suspendUpdate(); | ||
− | y2 = board.create('point', [0,function(){return y1.Y()-s.Value();}],{style:7,name:' '}); | + | var 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:' '}); | + | var 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)'}); | + | var 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:' '}); | + | var 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:' '}); | + | var 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}); | + | var 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}); | + | var v2 = board.create('line', [z2,y2],{strokeColor:'gray',dash:2,strokeWidth:1}); |
− | v3 = board.create('line', [z3,y3],{strokeColor:'gray',dash:2,strokeWidth:1}); | + | var 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}); | + | var 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}); | + | var 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}); | + | var h3 = board.create('curve', [function(t){return z3.X();},function(t){return t},0,20], {strokeColor:'gray',dash:2,strokeWidth:1}); |
board.unsuspendUpdate(); | board.unsuspendUpdate(); | ||
</jsxgraph> | </jsxgraph> | ||
Line 35: | Line 35: | ||
<source lang="javascript"> | <source lang="javascript"> | ||
− | board = JXG.JSXGraph.initBoard('box', {originX: 50, originY: 400, unitX: 50, unitY: 50}); | + | var board = JXG.JSXGraph.initBoard('box', {originX: 50, originY: 400, unitX: 50, unitY: 50}); |
− | + | var b1axisx = board.create('axis', [[0,0], [1,0]], {}); | |
− | + | var b1axisy = board.create('axis', [[0,0], [0,1]], {}); | |
− | b1axisy = board.create('axis', [[0,0], [0,1]], {}); | ||
var f = function(x) { return 1.0/x; }; | var f = function(x) { return 1.0/x; }; | ||
− | graph = board.create('functiongraph', [f,0.00001, 15], {strokeColor:'#00ff00'}); | + | var graph = board.create('functiongraph', [f,0.00001, 15], {strokeColor:'#00ff00'}); |
− | s = board.create('slider', [[0,-1],[4,-1],[0,1,1]],{name:'ε'}); | + | var s = board.create('slider', [[0,-1],[4,-1],[0,1,1]],{name:'ε'}); |
− | y1 = board.create('glider', [0,3,b1axisy],{name:'f(a)'}); | + | var y1 = board.create('glider', [0,3,b1axisy],{name:'f(a)'}); |
− | y2 = board.create('point', [0,function(){return y1.Y()-s.Value();}],{style:7,name:' '}); | + | board.suspendUpdate(); |
− | y3 = board.create('point', [0,function(){return y1.Y()+s.Value();}],{style:7,name:' '}); | + | var y2 = board.create('point', [0,function(){return y1.Y()-s.Value();}],{style:7,name:' '}); |
+ | var 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)'}); | + | var 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:' '}); | + | var 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:' '}); | + | var 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}); | + | var 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}); | + | var v2 = board.create('line', [z2,y2],{strokeColor:'gray',dash:2,strokeWidth:1}); |
− | v3 = board.create('line', [z3,y3],{strokeColor:'gray',dash:2,strokeWidth:1}); | + | var 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}); | + | var 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}); | + | var 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}); | + | var h3 = board.create('curve', [function(t){return z3.X();},function(t){return t},0,20], {strokeColor:'gray',dash:2,strokeWidth:1}); |
board.unsuspendUpdate(); | board.unsuspendUpdate(); | ||
</source> | </source> |
Revision as of 11:31, 25 March 2011
References
The underlying JavaScript code
var board = JXG.JSXGraph.initBoard('box', {originX: 50, originY: 400, unitX: 50, unitY: 50});
var b1axisx = board.create('axis', [[0,0], [1,0]], {});
var b1axisy = board.create('axis', [[0,0], [0,1]], {});
var f = function(x) { return 1.0/x; };
var graph = board.create('functiongraph', [f,0.00001, 15], {strokeColor:'#00ff00'});
var s = board.create('slider', [[0,-1],[4,-1],[0,1,1]],{name:'ε'});
var y1 = board.create('glider', [0,3,b1axisy],{name:'f(a)'});
board.suspendUpdate();
var y2 = board.create('point', [0,function(){return y1.Y()-s.Value();}],{style:7,name:' '});
var y3 = board.create('point', [0,function(){return y1.Y()+s.Value();}],{style:7,name:' '});
var z1 = board.create('point', [function(){return f(y1.Y());},function(){return y1.Y();}],{style:7,name:'f(a)'});
var z2 = board.create('point', [function(){return f(y2.Y());},function(){return y2.Y();}],{style:7,name:' '});
var z3 = board.create('point', [function(){return f(y3.Y());},function(){return y3.Y();}],{style:7,name:' '});
var v1 = board.create('line', [z1,y1],{strokeColor:'gray',dash:2,strokeWidth:1,straightFirst:false,straightLast:false});
var v2 = board.create('line', [z2,y2],{strokeColor:'gray',dash:2,strokeWidth:1});
var v3 = board.create('line', [z3,y3],{strokeColor:'gray',dash:2,strokeWidth:1});
var h1 = board.create('curve', [function(t){return z1.X();},function(t){return t},0,20], {strokeColor:'gray',dash:2,strokeWidth:1});
var h2 = board.create('curve', [function(t){return z2.X();},function(t){return t},0,20], {strokeColor:'gray',dash:2,strokeWidth:1});
var h3 = board.create('curve', [function(t){return z3.X();},function(t){return t},0,20], {strokeColor:'gray',dash:2,strokeWidth:1});
board.unsuspendUpdate();