# Difference between revisions of "Function graph animation"

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<source lang="javascript"> | <source lang="javascript"> | ||

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+ | // User supplied function to be drawn. | ||

var f = function(x) { return Math.sin(x); }; | var f = function(x) { return Math.sin(x); }; | ||

## Latest revision as of 09:30, 31 October 2012

### The JavaScript code

```
// User supplied function to be drawn.
var f = function(x) { return Math.sin(x); };
var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-5,2,5,-2], axis:true, keepaspectratio:false});
var start = -4,
end = 4,
x = start,
step = 0.2,
turtle = brd.create('turtle', [x, f(x)]);
var moveForward = function() {
x += step;
if (x>end) {
return;
}
turtle.moveTo([x, f(x)]);
setTimeout(moveForward, 200); // delay by 200 ms
};
turtle.hideTurtle(); // Hide the turtle arrow
moveForward(); // Start the drawing
```