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

addWalkingPath

R Documentation

Add walking path from case/landmark to nearest or selected pump. (prototype)

Description

Add walking path from case/landmark to nearest or selected pump. (prototype)

Usage

addWalkingPath(origin = 1, destination = NULL, type = "case-pump",
  vestry = FALSE, latlong = FALSE, case.set = "observed",
  location = "nominal", weighted = TRUE, distance.unit = "meter",
  time.unit = "second", walking.speed = 5, include.landmarks = TRUE,
  mileposts = TRUE, milepost.unit = "distance", milepost.interval = NULL,
  alpha.level = 1, ...)

Arguments

`origin`	Numeric. Vector of origin(s) (numeric or case/landmark name).
`destination`	Numeric. Vector of destination(s) (numeric or landmark/pump name).
`type`	Character. Path case to pump. FALSE is all other combinations of cases, landmarks and pumps.
`vestry`	Logical. `TRUE` uses the 14 pumps from the map in the Vestry Report. `FALSE` uses the 13 pumps from the original map.
`latlong`	Logical.
`case.set`	Character. "observed" or "expected".
`location`	Character. For cases and pumps. "anchor, "fatality" or "orthogonal.
`weighted`	Logical. `TRUE` computes shortest path in terms of road length. `FALSE` computes shortest path in terms of the number of nodes.
`distance.unit`	Character. Unit of distance: "meter" or "yard".
`time.unit`	Character. "hour", "minute", or "second".
`walking.speed`	Numeric. Walking speed in km/hr.
`include.landmarks`	Logical. Include landmarks as cases.
`mileposts`	Logical. Plot mile/time posts.
`milepost.unit`	Character. "distance" or "time".
`milepost.interval`	Numeric. Mile post interval unit of distance (yard or meter) or unit of time (seconds).
`alpha.level`	Numeric. Alpha level transparency for path: a value in [0, 1].
`...`	Additional plotting parameters.