addMilePosts: Add distance or time based "mileposts" to an observed walking...

In cholera: Amend, Augment and Aid Analysis of John Snow's Cholera Map

Add distance or time based "mileposts" to an observed walking neighborhood plot.

Description

Add distance or time based "mileposts" to an observed walking neighborhood plot.

Usage

addMilePosts(pump.subset = NULL, pump.select = NULL, vestry = FALSE,
  unit = "distance", interval = NULL, walking.speed = 5,
  type = "arrows", multi.core = TRUE, dev.mode = FALSE)

Arguments

pump.subset	Numeric. Vector of numeric pump IDs to subset from the neighborhoods defined by pump.select. Negative selection possible. NULL uses all pumps in pump.select.
pump.select	Numeric. Numeric vector of pumps to define possible pump neighborhoods (i.e. the "population"). Negative selection is possible. NULL selects all "observed" pumps (i.e., pumps with at least one case).
vestry	Logical. TRUE uses the 14 pumps from the Vestry Report. FALSE uses the 13 from the original map.
unit	Character. Milepost unit of measurement: "distance" or "time".
interval	Numeric. Interval between mileposts: 50 meters for "distance"; 60 seconds for "time".
walking.speed	Numeric. Walking speed in km/hr.
type	Character. "arrows" or "points".
multi.core	Logical or Numeric. TRUE uses parallel::detectCores(). FALSE uses one, single core. You can also specify the number logical cores. See vignette("Parallelization") for details.
dev.mode	Logical. Development mode uses parallel::parLapply().

Value

R base graphics arrows or points.

cholera documentation built on March 7, 2023, 5:31 p.m.