runifdisc
From spatstat v1.16-2
by Adrian Baddeley
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), ...)
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.
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
- The simulated point pattern (an object of class
"ppp"
).
See Also
Examples
# 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)
Community examples
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