| sample.strat {animation} | R Documentation |
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).
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), ...)
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
|
None (invisible 'NULL').
Yihui Xie <http://yihui.name>
http://animation.yihui.name/samp:stratified_sampling
sample, sample.simple,
sample.cluster, sample.ratio,
sample.system
oopt = ani.options(nmax = ifelse(interactive(), 50, 2))
par(mar = rep(1, 4), lwd = 2)
sample.strat(col = c("bisque", "white"))
## HTML animation page
saveHTML({
par(mar = rep(1, 4), lwd = 2)
ani.options(nmax = ifelse(interactive(), 50, 2))
sample.strat(col = c("bisque", "white"))
}, img.name = "sample.strat", htmlfile = "sample.html", ani.height = 350, ani.width = 500,
title = "Demonstration of the stratified sampling", description = c("Every rectangle stands for a stratum, and the simple",
"random sampling without replacement is performed within each stratum."))
ani.options(oopt)