TDLM (version 1.0.0)

extract_opportunities: Compute the number of opportunities between pairs of locations

Description

This function computes the number of opportunities between pairs of locations as defined in Lenormand2016;textualTDLM. For a given pair of location the number of opportunities between the location of origin and the location of destination is based on the number of opportunities in a circle of radius equal to the distance between origin and destination centered in the origin. The number of opportunities at origin and destination are not included.

Usage

extract_opportunities(opportunity, distance, check_names = FALSE)

Value

A squared matrix in which each element represents the number of opportunities between a pair of locations.

Arguments

opportunity

a numeric vector representing the number of opportunities per location. The value should be positive.

distance

a squared matrix representing the distance between locations.

check_names

a boolean indicating if the ID location are used as vector names, matrix rownames and colnames and if they should be checked (see Note).

Author

Maxime Lenormand ()

References

Lenormand2016TDLM

See Also

calib_param() extract_spatial_information() check_format_names()

Examples

data(mass)
data(distance)

opportunity <- mass[, 1]

sij <- extract_opportunities(
  opportunity = opportunity,
  distance = distance,
  check_names = FALSE
)