# Curve

From JSXGraph Wiki

Revision as of 09:51, 19 September 2008 by 132.180.198.9 (talk)

There are various possibilities to display curves and plots. JSXGraph supports the following curve types which can be set by changing the property "curveType". In many cases JSXGraph can guess the curveType from the input parameters, but sometimes the curveType has to be set explicitly.

- 'plot': function plotter
- 'parameter': parameter curves.
- 'graph': data plot
- 'polar': polar curves

## Function plotter - curveType:'plot'

First, we initialize the board and set axes:

```
var b = JXG.JSXGraph.initBoard('jxgbox', {originX: 200, originY: 200, unitX: 20, unitY: 20});
axisx = b.createElement('axis', [[1,0], [0,0]], {});
axisy = b.createElement('axis', [[0,1], [0,0]], {});
```

Now we can plot for example a sine curve from -π to 4π.

```
b.createElement('curve', ['x',function(x){return Math.sin(x);},'x',-Math.PI,2*Math.PI],{curveType:'plot'});
```