# JavaScript 3D Confidence Ellipsoid Chart

Example showcasing the 3D variant of a common statistical data visualization method: confidence ellipses.

Confidence ellipses are used especially with statistic chart applications. A common usage, for example, is the 95% confidence ellipse, which visualizes the area that contains 95% of samples, which makes it easier for the user to understand which points are *outliers*.

The same can be done in more complex 3D scatter data set visualizations, in which case the ellipse becomes an *ellipsoid*.

Programmatically, this can be implemented by drawing the ellipsoid as a *sphere* with different sizes along the X, Y and Z axes.

```
const ellipsoidSeries = chart3D
.addPointSeries()
// Specify ellipsoid center coordinate.
.add({ x: 0, y: 0, z: 0 })
.setPointStyle(
new PointStyle3D.Triangulated({
// Specify ellipsoid dimensions.
size: { x: 1, y: 2, z: 1.5 },
}),
)
```