sample.strat {animation}R Documentation

Demonstration for the stratified sampling

Description

Each rectangle stands for a stratum, and the simple random sampling without replacement is performed within each stratum. The points being sampled are marked out (by red circles by default).

Usage

sample.strat(pop = ceiling(10 * runif(10, 0.5, 1)), size = ceiling(pop * 
    runif(length(pop), 0, 0.5)), p.col = c("blue", "red"), p.cex = c(1, 3), 
    ...)

Arguments

pop

a vector for the size of each stratum in the population.

size

a corresponding vector for the sample size in each stratum (recycled if necessary).

p.col, p.cex

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

...

other arguments passed to rect to annotate the “strata”

Value

None (invisible 'NULL').

Author(s)

Yihui Xie

References

Examples at https://yihui.name/animation/example/sample-strat/

See Also

sample, sample.simple, sample.cluster, sample.ratio, sample.system


[Package animation version 2.5 Index]