D3 2.10 allows you to implement custom interpolators for [d3.svg.line](https://github.com/mbostock/d3/wiki/SVG-Shapes#wiki-line) and [d3.svg.area](https://github.com/mbostock/d3/wiki/SVG-Shapes#wiki-area). This contrived example shows how to draw arcs between data points using SVG’s [elliptical arc path segments](http://www.w3.org/TR/SVG/paths.html#PathDataEllipticalArcCommands).

```javascript
var line = d3.svg.line()
    .interpolate(function(points) { return 0; })
    .x(function(d) { return x(d.x); })
    .y(function(d) { return y(d.y); });
```