animation (version 2.7)

sample.system: Demonstration for the systematic sampling

Description

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.

Usage

sample.system(
  nrow = 10,
  ncol = 10,
  size = 15,
  p.col = c("blue", "red"),
  p.cex = c(1, 3)
)

Arguments

nrow

the desired number of rows of the sample frame.

ncol

the desired number of columns of the sample frame.

size

the sample size.

p.col, p.cex

different colors / magnification rate to annotate the population and the sample

Value

None (invisible NULL).

References

Examples at https://yihui.org/animation/example/sample-system/

See Also

sample, sample.simple, sample.cluster, sample.ratio, sample.strat