dot-cardinalDistance: Movement of occupied cells in a given direction of a fixed...

In enmSdmX: Species Distribution Modeling and Ecological Niche Modeling

Movement of occupied cells in a given direction of a fixed point

Description

This function calculates the weighted distance moved by a mass represented by set of cells which fall north, south, east, or west of a given location (i.e., typically the centroid of the starting population). Values >0 confer movement to the north, south, east, or west of this location.

Usage

.cardinalDistance(
  direction,
  longOrLat,
  coordVect,
  x1,
  x2,
  refCoord,
  x1weightedLongs,
  x1weightedLats,
  x2weightedLongs,
  x2weightedLats,
  x1weightedElev = NULL,
  x2weightedElev = NULL
)

Arguments

direction	Any of: 'n' (north), 's' (south), 'e' (east), or 'w' (west).
longOrLat	Numeric matrix, latitude or longitudes. If direction is 'n' or 's' this must be latitudes. If direction is 'e' or 'w' this must be longitudes.
coordVect	Vector of latitude or longitude of cell centers, depending on value of longOrLat. If latitude, these must go from south to north. If longitude, these must go from west to east.
x1	Matrix of weights in time 1 (i.e., population size).
x2	Matrix of weights in time 2 (i.e., population size).
refCoord	Numeric, latitude or longitude (depending on longOrLat) of reference point from which to partition the weights into a northern, southern, eastern, or western portion.
x1weightedLongs	Matrix of longitudes weighted (i.e., by population size, given by x1).
x1weightedLats	Matrix of latitudes weighted (i.e., by population size, given by x1).
x2weightedLongs	Matrix of longitudes weighted (i.e., by population size, given by x2).
x2weightedLats	Matrix of latitudes weighted (i.e., by population size, given by x2).
x1weightedElev	Matrix of elevations weighted by x1 or NULL.
x2weightedElev	Matrix of elevations weighted by x2 or NULL.

Value

A list object with distance moved and abundance of all cells north/south/east/west of reference point.

enmSdmX documentation built on April 3, 2025, 7:50 p.m.