# Convex Hull of a pointset

### Description

Convex Hull of a pointset in plane.

### Usage

1 | ```
convexhull(x, y=NULL,...)
``` |

### Arguments

`x` |
The data as a matrix, data frame or list. If it is a matrix or data frame, then each row is viewed as one bivariate observation. If it is a list, all components must be numerical vectors of equal length (coordinates of observations). |

`y` |
The data as a matrix, data frame or list. If it is a matrix or data frame, then each row is viewed as one bivariate observation. If it is a list, all components must be numerical vectors of equal length (coordinates of observations). |

`...` |
For future use. |

### Details

In dimension 2, calculates Convex Hull of a pointset.

### Value

Returns with respect to data set, ordered set of points on the convex hull.

### Author(s)

Nabil Mustafa, Saurabh Ray, and Mudassir Shabbir.

### References

N. Mustafa, S. Ray, and M. Shabbir, Statistical Data Depth of Pointsets in the Plane,*in prep.*.

### See Also

`inflate`

### Examples

1 2 3 | ```
## calculation of centroid of a random pointset
z = matrix(rnorm(24),nc=2)
x = convexhull(z)
``` |