segmentLocator: Locate road segment by ID.

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

Locate road segment by ID.

Description

Highlights the selected road segment and its cases.

Usage

segmentLocator(id = "216-1", zoom = 0.5, cases = "address",
  distance.unit = "meter", time.unit = "second", walking.speed = 5,
  add.title = TRUE, add.subtitle = TRUE, highlight = TRUE,
  cex.text = 0.67)

Arguments

id	Character. A concatenation of a street's numeric ID, a whole number between 1 and 528, and a second number to identify the segment.
zoom	Logical or Numeric. A numeric value >= 0 controls the degree of zoom. The default is 0.5.
cases	Character. Plot cases: NULL, "address" or "fatality".
distance.unit	Character. Unit of distance: "meter", "yard" or "native". "native" returns the map's native scale. See vignette("roads") for information on conversion.
time.unit	Character. "hour", "minute", or "second".
walking.speed	Numeric. Walking speed in km/hr.
add.title	Logical. Print title.
add.subtitle	Logical. Print subtitle.
highlight	Logical. Highlight selected road and its cases.
cex.text	Numeric.

Value

A base R graphics plot.

Note

With Dodson and Tobler's data, a street (e.g., Broad Street) is often comprised of multiple straight line segments. To identify each segment individually, an additional number is appended to form a text string ID (e.g., "116-2"). See cholera::road.segments.

Examples

segmentLocator("190-1")
segmentLocator("216-1")
segmentLocator("216-1", distance.unit = "yard")

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