xy_sample: Sample locations in a study area of rectangular shape

In AWF-GAUG/fisim: Forest Inventory Simulator (fisim) is a package for simulating response and samplign designs common in forest inventories.

Description

Sample locations in a study area of rectangular shape

Usage

xy_sample(sp_poly, n, M = 1, method = "random", ...)

Arguments

sp_poly	An object of class SpatialPolygons from the sp package.
n	Sample size, i.e. number of sample locations.
M	Number of independent samples of size n.
method	character string; 'random' for completely random placement of points; 'regular' for systematic sampling (equal distance between points in x and y direction )
...	optional argument, passed to the appropriate function for systematic sampling: optional use of cell_size to specify the area of a grid cell instead of the number of points n; use random_rot = TRUE to rotate the sampling grid in a random direction.

Value

A data.table object with M times n rows holding an identifier and xy-coordinates.

AWF-GAUG/fisim documentation built on May 28, 2019, 11:02 a.m.