GRTS.ODBC: Perform a GRTS sampling on a database table via ODBC

In GRTS: Spatially balanced sampling based on GRTS

Description

Perform a GRTS sampling on a database table via ODBC

Usage

  GRTS.ODBC(channel, tablename, grts.vars, cellsize,
    samplesize, availableLevels = 20, reset = FALSE)

Arguments

channel	an ODBC channel to the database
tablename	the name of the table in the database
grts.vars	the name of the variabeles which define the GRTS sampling space. Typically an X and Y variable. However the only limitations are that all variables are numeric and the number of variables must be at least one.
cellsize	the size of the smallest GRTS cell for each dimension.
samplesize	the required sample size
availableLevels	the number of available GRTS levels in the database. These must be named L01, L02, ... Currently available levels is limited to 99
reset	logical value. If FALSE the current GRTS randomisation is completed. If TRUE a new GRTS randomisation will start.

GRTS documentation built on May 2, 2019, 6:39 p.m.