Difference between revisions of "Draggable exponential function"
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| + | Plot the function | ||
| + | ''y = e^{ax}'' | ||
| + | where the parameter ''a'' is determined by the Point ''A=(x_A, x_Y)''. | ||
<jsxgraph width="400" height="400" box="box1"> | <jsxgraph width="400" height="400" box="box1"> | ||
var board = JXG.JSXGraph.initBoard('box1', {boundingbox: [-5, 20, 5, -1], axis:true}); | var board = JXG.JSXGraph.initBoard('box1', {boundingbox: [-5, 20, 5, -1], axis:true}); | ||
| Line 13: | Line 16: | ||
}], {fontSize: 16}); | }], {fontSize: 16}); | ||
</jsxgraph> | </jsxgraph> | ||
| + | |||
| + | |||
| + | ===The JavaScript code=== | ||
| + | <source lang="javascript"> | ||
| + | var board = JXG.JSXGraph.initBoard('box1', {boundingbox: [-5, 20, 5, -1], axis:true}); | ||
| + | |||
| + | var p = board.create('point', [1, Math.exp(1)]); | ||
| + | var graph = board.create('functiongraph', [ | ||
| + | function(x) { | ||
| + | var a = Math.log(p.Y()) / p.X(); | ||
| + | return Math.exp(a * x); | ||
| + | }]); | ||
| + | |||
| + | var txt = board.create('text', [-3, 10, function () { | ||
| + | return "a = " + (Math.log(p.Y()) / p.X()).toFixed(2); | ||
| + | }], {fontSize: 16}); | ||
| + | </source> | ||
[[Category:Examples]] | [[Category:Examples]] | ||
[[Category:Calculus]] | [[Category:Calculus]] | ||
Revision as of 11:32, 16 February 2016
Plot the function y = e^{ax} where the parameter a is determined by the Point A=(x_A, x_Y).
The JavaScript code
var board = JXG.JSXGraph.initBoard('box1', {boundingbox: [-5, 20, 5, -1], axis:true});
var p = board.create('point', [1, Math.exp(1)]);
var graph = board.create('functiongraph', [
function(x) {
var a = Math.log(p.Y()) / p.X();
return Math.exp(a * x);
}]);
var txt = board.create('text', [-3, 10, function () {
return "a = " + (Math.log(p.Y()) / p.X()).toFixed(2);
}], {fontSize: 16});
