# convex_hull

From igraph v1.2.2
by Gabor Csardi

##### Convex hull of a set of vertices

Calculate the convex hull of a set of points, i.e. the covering polygon that has the smallest area.

- Keywords
- graphs

##### Usage

`convex_hull(data)`

##### Arguments

- data
The data points, a numeric matrix with two columns.

##### Value

A named list with components:

The indices of the input vertices that constritute the convex hull.

The coordinates of the corners of the convex hull.

##### References

Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest, and Clifford Stein. Introduction to Algorithms, Second Edition. MIT Press and McGraw-Hill, 2001. ISBN 0262032937. Pages 949-955 of section 33.3: Finding the convex hull.

##### Examples

```
# NOT RUN {
M <- cbind( runif(100), runif(100) )
convex_hull(M)
# }
```

*Documentation reproduced from package igraph, version 1.2.2, License: GPL (>= 2)*

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