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

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

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.

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

)
if `nsim=1`

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

.

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`

.

# 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) # }