An R package to draw samples
SDraw draws five types of equal-probability samples from spatial objects, focusing on spatially balanced algorithms that are especially suited for environmental monitoring. SDraw implements the following:
- Halton Iterative Partitions (HIP)
- Balanced Acceptance Samples (BAS)
- Generalized Random Tesselation Stratified (GRTS)
- Simple Systematic Samples (SSS)
- Simple Random Samples (SRS)
The first four sample types (HIP, BAS, GRTS, and SSS) provide spatially balanced samples. SRS does not. Frame types can be points, lines, or polygons implemented as
See package help (
help("SDraw")) and help for function
help("sdraw")) to get started. A list of available functions can be obtained with
help(package="SDraw"). [For the newby: all of R is case sensitive.
SDraw is different than
License: GNU General Public License
Installation instructions are here
A technical PDF manual listing all functions and parameters is here.