sample.system {animation} | R Documentation |
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.
sample.system(nrow = 10, ncol = 10, size = 15, p.col = c("blue", "red"), p.cex = c(1, 3))
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 |
None (invisible NULL
).
Yihui Xie
sample
, sample.simple
,
sample.cluster
, sample.ratio
,
sample.strat
oopt = ani.options(nmax = ifelse(interactive(), 50, 2)) par(mar = rep(1, 4), lwd = 2) sample.system() ## HTML animation pages saveHTML({ ani.options(interval = 1, nmax = ifelse(interactive(), 30, 2)) par(mar = rep(1, 4), lwd = 2) sample.system() }, img.name = "sample.system", htmlfile = "sample.html", ani.height = 350, ani.width = 500, title = "Demonstration of the systematic sampling", description = "Sampling with equal distances.") ani.options(oopt)