surveillance: runifdisc – R documentation

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runifdisc

Sample Points Uniformly on a Disc

Description

Sample n points uniformly on a disc of radius r in two-dimensional euclidean space via transformation to polar coordinates: the angle is sampled uniformly from U(0,2π), the length is sampled uniformly from √{U(0,r^2)}. The sampled polar coordinates are then back-transformed to cartesian coordinates.

Usage

runifdisc(n, r = 1, buffer = 0)

Arguments

`n`	integer size of the sample.
`r`	numeric radius of the disc (centered at (0,0)).
`buffer`	radius of inner buffer zone without points.

Value

A two-column coordinate matrix of the sampled points.

Author(s)

Sebastian Meyer

Examples

x <- surveillance:::runifdisc(1000, 3)
plot(x)

surveillance

Temporal and Spatio-Temporal Modeling and Monitoring of Epidemic Phenomena

v1.19.1

GPL-2

Authors

Michael H<f6>hle [aut, ths] (<https://orcid.org/0000-0002-0423-6702>), Sebastian Meyer [aut, cre] (<https://orcid.org/0000-0002-1791-9449>), Michaela Paul [aut], Leonhard Held [ctb, ths], Howard Burkom [ctb], Thais Correa [ctb], Mathias Hofmann [ctb], Christian Lang [ctb], Juliane Manitz [ctb], Andrea Riebler [ctb], Daniel Saban<e9>s Bov<e9> [ctb], Ma<eb>lle Salmon [ctb], Dirk Schumacher [ctb], Stefan Steiner [ctb], Mikko Virtanen [ctb], Wei Wei [ctb], Valentin Wimmer [ctb], R Core Team [ctb] (A few code segments are modified versions of code from base R)

Initial release

2021-03-30