My Talk on Animations at useR! 2010 (NIST, Gaithersburg)

animation-useR2010-Xie.R

pdf.options(width = 7, height = 5, family = "AvantGarde")
library(RColorBrewer)

library(animation)

# title page
# pdf('titlepic.pdf', width=7, height=4)
ani.options(nmax = 66, interval = 0)
data(HuSpeech)
par(mar = c(4, 4, 0.1, 0.1))
moving.block(dat = HuSpeech, FUN = function(..., dat = dat, 
    i = i, block = block) {
    plot(..., x = i + 1:block, xlab = "paragraph index", ylim = range(dat), 
        ylab = sprintf("HuSpeech[%s:%s]", i + 1, i + block))
}, type = "o", pch = 20)
# dev.off()


# Newton's method
# pdf('newton_method_succeed.pdf')
par(pch = 20, mar = c(4, 4, 3, 2))

ani.options(nmax = 50, interval = 1)
newton.method(function(x) 5 * x^3 - 7 * x^2 - 40 * 
    x + 100, 7.15, c(-6.2, 7.1))
# dev.off()

# pdf('newton_method_fail.pdf')
# par(pch = 20,mar=c(4,4,3,2))
ani.options(interval = 0.5, nmax = 50)
xx = newton.method(function(x) atan(x), rg = c(-5, 
    5), init = 1.5)
xx$root
# dev.off()


# quincunx demo
# pdf('quincunx.pdf')
set.seed(123)
ani.options(nmax = 200 + 15 - 2, interval = 0.03)
freq = quincunx(balls = 200, col.balls = sample(brewer.pal(9, 
    "Set1"), 200, TRUE))
# dev.off()

# bootstrap
# pdf('boot_iid.pdf')
par(mar = c(1.5, 3, 1, 0.1), cex.lab = 0.8, cex.axis = 0.8, 
    mgp = c(2, 0.5, 0), tcl = -0.3)
ani.options(interval = 0, nmax = 40)
boot.iid(main = c("", ""))
# dev.off()

# moving window
# pdf('mwar_ani.pdf')
ani.options(interval = 0, nmax = 50)
par(mar = c(2, 3, 1, 0.5), mgp = c(1.5, 0.5, 0))
mwar.ani(, pch = 21, col = "red", bg = "yellow", type = "o")
# dev.off()


# HTML demo
ani.options(nmax = 100, interval = 0.1, ani.height = 500, 
    ani.width = 600, loop = FALSE, title = "Simulation of Buffon's Needle", 
    description = "There are three graphs made in each step: the top-left
    one is a simulation of the scenario, the top-right one is to help us
    understand the connection between dropping needles and the mathematical
    method to estimate pi, and the bottom one is the result for each
    dropping.")
ani.start()
par(mar = c(3, 2.5, 1, 0.2), pch = 20, mgp = c(1.5, 
    0.5, 0))
buffon.needle(type = "S")
ani.stop()


# SVGAnnotation is on Omegahat
# install.packages('SVGAnnotation', repos = 'http://www.omegahat.org/R')
library(SVGAnnotation)
# from example(animate)
p1 = matrix(c(2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 
    6, 6, 6), 5, , byrow = TRUE)
p2 = matrix(c(12, 2, 1, 10, 3, 1.2, 8, 4, 1.4, 6, 
    5, 1.5, 4, 6, 3), 5, , byrow = TRUE)
p3 = cbind(seq(4, 12, length = 5), rep(6, 5), c(1.5, 
    3, 5, 3, 1.5))
D = data.frame(rbind(p1, p2, p3))
names(D) = c("x", "y", "radius")
D$time = rep(1:5, 3)
D$id = rep(1:3, each = 5)
D = D[order(D$time), ]
pp = svgPlot({
    plot(y ~ x, subset(D, time == 1), pch = 21, col = c("red", 
        "green", "blue"), bg = c("red", "green", "blue"), xlim = range(D$x), 
        ylim = range(D$y))
    # Add horizontal and vertical lines at suitable positions.
    abline(h = c(2, 4, 6), col = "lightgray", lty = 3)
    abline(v = c(2, 7, 12), col = "lightgray", lty = 2)
})

animate(pp, D, "time", dropFirst = TRUE, labels = seq(2005, 
    length = 5), begin = 1, radii = "radius")

saveXML(pp, "gm1.svg")
# use Opera to view gm1.svg


# swfDevice is on R-Forge currently and does not work on Windows
# install.packages('swfDevice', repos = 'http://r-forge.r-project.org')
library(swfDevice)
library(animation)
swf("knn_ani.swf", frameRate = 1, ttf = "vera")
ani.options(interval = 0, nmax = 10)
x = matrix(c(rnorm(80, mean = -1), rnorm(80, mean = 1)), 
    ncol = 2, byrow = TRUE)
y = matrix(rnorm(20, mean = 0, sd = 1.2), ncol = 2)
knn.ani(train = x, test = y, cl = rep(c("first class", 
    "second class"), each = 40), k = 30)
dev.off()


library(animation)
ani.options(nmax = 1)
saveMovie({
    par(pty = "s", mar = rep(1, 4))
    vi.lilac.chaser()
}, interval = 0.05)