Nearest Centroid (NC) Sampling
Addz
Allocation
Calculate centroids
Check population file
Design variances for NC sample.
Design variances for single stratum.
Pre-existing plot neighbours
Nearest Centroid (NC) Sample
Nearest Centroid (NC) Plot Selection
Nearest Centroid (NC) Sampling
Random sample.
Spatial Plot
Provides functionality for performing Nearest Centroid (NC) Sampling. The NC sampling procedure was developed for forestry applications and selects plots for ground measurement so as to maximize the efficiency of imputation estimates. It uses multiple auxiliary variables and multivariate clustering to search for an optimal sample. Further details are given in Melville G. & Stone C. (2016) <doi:10.1080/00049158.2016.1218265>.