Demonstration of the systematic sampling
Yihui Xie & Lijia Yu / 2017-04-04
The whole sample frame is denoted by a matrix (
nrow * ncol) in the
plane, and the sample points with equal intervals are drawn out according to
a random starting point. The points being sampled are marked by red circles.
library(animation) ani.options(nmax = 50) par(mar = rep(1, 4), lwd = 2) sample.system()