plot.ahull {alphahull} | R Documentation |

## Plot the alpha-convex hull

### Description

This function returns a plot of the `\alpha`

-convex hull. If desired, it also adds the Delaunay triangulation, Voronoi diagram and `\alpha`

-shape of the sample.

### Usage

```
## S3 method for class 'ahull'
plot(x, add = FALSE, do.shape = FALSE,
wlines = c("none", "both", "del", "vor"), wpoints = TRUE,
number = FALSE, col = NULL, xlim = NULL,
ylim = NULL, lwd = NULL, ...)
```

### Arguments

`x` |
Object of class |

`add` |
Logical, if TRUE add to a current plot. |

`do.shape` |
Logical, indicates if the |

`wlines` |
"Which lines?". I.e. should the Delaunay triangulation be plotted (wlines='del'), should the Voronoi diagram be plotted (wlines='vor'), should both be plotted (wlines='both'), or none (wlines='none', the default)? |

`wpoints` |
Logical, indicates if sample points should be plotted. |

`number` |
Logical, defaulting to FALSE; if TRUE then the points plotted will be labelled with their index numbers. |

`col` |
The colour numbers for plotting the |

`xlim` |
The limits on the x-axis. |

`ylim` |
The limits on the y-axis. |

`lwd` |
The line widths for plotting the tesselations, the |

`...` |
Arguments to be passed to methods, such as graphical parameters (see |

### See Also

### Examples

```
## Not run:
# Random sample in the unit square
x <- matrix(runif(100), nc = 2)
# Value of alpha
alpha <- 0.2
# alpha-convex hull
ahull.obj <- ahull(x, alpha = alpha)
# Plot including the alpha-convex hull in pink, alpha-shape in blue,
# sample points in black, voronoi diagram in green
# and Delaunay triangulation in red
plot(ahull.obj, do.shape = TRUE, wlines = "both", col = c(6, 4, 1, 2, 3))
# Random sample from a uniform distribution on a Koch snowflake
# with initial side length 1 and 3 iterations
x <- rkoch(2000, side = 1, niter = 3)
# Value of alpha
alpha <- 0.05
# Alpha-convex hull
ahull.obj <- ahull(x, alpha = alpha)
plot(ahull.obj)
## End(Not run)
```

*alphahull*version 2.5 Index]