# runifdisc

##### Generate N Uniform Random Points in a Disc

Generate a random point pattern containing \(n\) independent uniform random points in a circular disc.

##### Usage

`runifdisc(n, radius=1, centre=c(0,0), ..., nsim=1, drop=TRUE)`

##### Arguments

- n
Number of points.

- radius
Radius of the circle.

- centre
Coordinates of the centre of the circle.

- …
Arguments passed to

`disc`

controlling the accuracy of approximation to the circle.- nsim
Number of simulated realisations to be generated.

- drop
Logical. If

`nsim=1`

and`drop=TRUE`

(the default), the result will be a point pattern, rather than a list containing a point pattern.

##### Details

This function generates `n`

independent random points,
uniformly distributed in a circular disc.

It is faster (for a circular window) than the general
code used in `runifpoint`

.

To generate random points in an ellipse, first generate points in a
circle using `runifdisc`

,
then transform to an ellipse using `affine`

,
as shown in the examples.

To generate random points in other windows, use
`runifpoint`

.
To generate non-uniform random points, use `rpoint`

.

##### Value

A point pattern (an object of class `"ppp"`

)
if `nsim=1`

, or a list of point patterns if `nsim > 1`

.

##### See Also

##### Examples

```
# NOT RUN {
# 100 random points in the unit disc
plot(runifdisc(100))
# 42 random points in the ellipse with major axis 3 and minor axis 1
X <- runifdisc(42)
Y <- affine(X, mat=diag(c(3,1)))
plot(Y)
# }
```

*Documentation reproduced from package spatstat, version 1.55-1, License: GPL (>= 2)*