SDALGCPpolygonpoints: SDALGCPpolygonpoints function

Description Usage Arguments Details Value Author(s) See Also

View source: R/dm_functions.R

Description

This function generate a random point pattern using Simple Sequential Inhibition (SSI) process, uniform sampling and regular grid point.

Usage

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SDALGCPpolygonpoints(
  my_shp,
  delta,
  method = 1,
  pop_shp = NULL,
  weighted = FALSE,
  rho = NULL,
  plot = FALSE,
  giveup = NULL
)

Arguments

my_shp

A SpatialPolygons or SpatialPolygonsDataFrame object containing the polygons (i.e each regions).

delta

distance between points

method

To specify which method to use to sample the points, the options are 1 for Simple Sequential Inhibition (SSI) process, 2 for Uniform sampling and 3 for regular grid. 1 is the default

pop_shp

Optional, The raster of population density map for population weighted approach

weighted

To specify if you want to use the population density, default to FALSE, i.e population density is not used.

rho

Optional, The packing density, default set to 0.55

plot

To display the plot of the points inside the polygon, default to TRUE

giveup

Number of rejected proposals after which the algorithm should terminate.

Details

This algorithm generates points inside the polygon using three algorithms specified in the method.

Value

It returns a list of the coordinates of the points created in each polygon and it has an associated attribute weighted which is either TRUE or FALSE to indicate if the population density is used or not.

Author(s)

Olatunji O. Johnson o.johnson@lancaster.ac.uk

Emanuele Giorgi e.giorgi@lancaster.ac.uk

Peter J. Diggle p.diggle@lancaster.ac.uk

See Also

SDALGCPCreatePoint, SDALGCPSSIPoint, SDALGCPUniformPoint, SDALGCPRegularPoint


olatunjijohnson/SDALGCP documentation built on March 20, 2021, 4:24 a.m.