https://github.com/cran/spatstat
Tip revision: cd674f37c3fcb1e480ff95e091708ec4ada60212 authored by Adrian Baddeley on 10 February 2011, 08:22:40 UTC
version 1.21-5
version 1.21-5
Tip revision: cd674f3
spatstat.R
if(dev.cur() <= 1) {
dd <- getOption("device")
if(is.character(dd)) dd <- get(dd)
dd()
}
oldpar <- par(ask = interactive() && dev.interactive(orNone=TRUE))
oldoptions <- options(warn=-1)
fanfare <- function(stuff) {
plot(c(0,1),c(0,1),type="n",axes=FALSE, xlab="", ylab="")
text(0.5,0.5, stuff, cex=2.5)
}
fanfare("Spatstat demonstration")
fanfare("I. Types of data")
data(swedishpines)
plot(swedishpines, main="Point pattern")
data(demopat)
plot(demopat, cols=c("green", "blue"), main="Multitype point pattern")
data(longleaf)
plot(longleaf, fg="blue", main="Marked point pattern")
a <- psp(runif(20),runif(20),runif(20),runif(20), window=owin())
plot(a, main="Line segment pattern")
plot(owin(), main="Rectangular window")
data(letterR)
plot(letterR, main="Polygonal window")
plot(as.mask(letterR), main="Binary mask window")
Z <- as.im(function(x,y){ sqrt((x - 1)^2 + (y-1)^2)}, square(2))
plot(Z, main="Pixel image")
X <- runifpoint(42)
plot(dirichlet(X), main="Tessellation")
enable3d <- ("scatterplot3d" %in% row.names(installed.packages()))
if(enable3d)
plot(rpoispp3(100), main="Three-dimensional point pattern")
fanfare("II. Graphics")
plot(letterR, col="green", border="red", lwd=2, main="Polygonal window with colour fill")
plot(letterR, hatch=TRUE, spacing=0.15, angle=30, main="Polygonal window with line shading")
data(amacrine)
plot(amacrine, chars=c(1,16),
main="plot(X, chars = c(1,16))")
plot(amacrine, cols=c("red","blue"), chars=16,
main="plot(X, cols=c(\"red\", \"blue\"))")
opa <- par(mfrow=c(1,2))
plot(longleaf, markscale=0.03, main="markscale=0.03")
plot(longleaf, markscale=0.09, main="markscale=0.09")
par(opa)
Z <- as.im(function(x,y) { r <- sqrt(x^2+y^2); r * exp(-r) },
owin(c(-5,5),c(-5,5)))
plot(Z, main="pixel image: image plot")
plot(Z, main="pixel image: image plot (heat colours)", col=heat.colors(256))
contour(Z, main="pixel image: contour plot", axes=FALSE)
plot(Z, main="pixel image: image + contour plot")
contour(Z, add=TRUE)
persp(Z, colmap=terrain.colors(128), shade=0.3, phi=30,theta=100,
main="pixel image: perspective plot")
ct <- colourmap(rainbow(20), breaks=seq(-1,1,length=21))
plot(ct, main="Colour map for real numbers")
ca <- colourmap(rainbow(8), inputs=letters[1:8])
plot(ca, main="Colour map for discrete values")
fanfare("III. Conversion between types")
data(chorley)
W <- as.owin(chorley)
plot(W, "window W")
plot(as.mask(W))
plot(as.mask(W, dimyx=1000))
plot(as.im(W, value=3))
plot(as.im(W, value=3, na.replace=0), ribbon=TRUE)
plot(as.im(function(x,y) {x^2 + y}, W=square(1)),
main="as.im(function(x,y){x^2+y})")
V <- delaunay(runifpoint(12))
plot(V, main="Tessellation V")
plot(as.im(V, dimyx=256), main="as.im(V)")
plot(as.owin(V))
X <- swedishpines
plot(X, "point pattern X")
plot(as.im(X), col=c("white","red"), ribbon=FALSE, xlab="", ylab="")
plot(as.owin(X), add=TRUE)
fanfare("IV. Subsetting and splitting data")
plot(X, "point pattern X")
subset <- 1:20
plot(X[subset], main="subset operation: X[subset]")
subwindow <- owin(poly=list(x=c(0,96,96,40,40),y=c(0,0,100,100,50)))
plot(X[subwindow], main="subset operation: X[subwindow]")
data(lansing)
plot(lansing, "Lansing Woods data")
plot(split(lansing), main="split operation: split(X)")
data(longleaf)
plot(longleaf, main="Longleaf Pines data")
plot(cut(longleaf, breaks=3),
main=c("cut operation", "cut(longleaf, breaks=3)"))
Z <- dirichlet(runifpoint(16))
X <- runifpoint(100)
plot(Z, main="points cut by tessellation")
plot(cut(X, Z), add=TRUE)
plot(split(X, Z), main="points split by tessellation")
W <- square(1)
X <- as.im(function(x,y){sqrt(x^2+y^2)}, W)
Y <- dirichlet(runifpoint(12, W))
plot(split(X,Y), main="image split by tessellation")
fanfare("V. Exploratory data analysis")
plot(swedishpines, main="Quadrat counts", pch="+")
tab <- quadratcount(swedishpines, 4)
plot(tab, add=TRUE, lty=2, cex=2, col="blue")
plot(swedishpines, main="", pch="+")
title(main=expression(chi^2 * " test"), cex.main=2)
tes <- quadrat.test(swedishpines, 3)
tes
plot(tes, add=TRUE, col="red", cex=1.5, lty=2, lwd=3)
title(sub=paste("p-value =", signif(tes$p.value,3)), cex.sub=1.4)
data(nztrees)
tesk <- kstest(nztrees, "x")
tesk
plot(tesk)
data(murchison)
mur <- lapply(murchison, rescale, s=1000)
X <- mur$gold
D <- distfun(mur$faults)
plot(rhohat(X, D),
main="Smoothed rate estimate",
xlab="Distance to nearest fault (km)",
legend=FALSE)
data(cells)
Z <- density.ppp(cells, 0.07)
plot(Z, main="Kernel smoothed intensity of point pattern")
plot(cells, add=TRUE)
data(shapley)
X <- unique(unmark(shapley))
plot(X, "Shapley galaxy concentration", pch=".")
plot(nnclean(X, k=17), main="Byers-Raftery nearest neighbour cleaning",
chars=c(".", "+"), cols=1:2)
Y <- sharpen(X, sigma=0.5, edgecorrect=TRUE)
plot(Y, main="Choi-Hall data sharpening", pch=".")
D <- density(a, sigma=0.05)
plot(D, main="Kernel smoothed intensity of line segment pattern")
plot(a, add=TRUE)
X <- runifpoint(42)
plot(dirichlet(X))
plot(X, add=TRUE)
plot(delaunay(X))
plot(X, add=TRUE)
data(longleaf)
parsave <- par(mfrow=c(1,2))
plot(longleaf, main="Longleaf Pines data")
plot(smooth.ppp(longleaf, 10), main="Spatial smoothing of marks")
par(parsave)
data(cells)
fryplot(cells, main=c("Fry plot","cells data"), pch="+")
data(longleaf)
miplot(longleaf, main="Morishita Index plot", pch=16, col="blue")
plot(swedishpines, main="Swedish Pines data")
K <- Kest(swedishpines)
plot(K, main="K function for Swedish Pines", legendmath=TRUE)
en <- envelope(swedishpines, fun=Kest, nsim=10, correction="translate")
plot(en, main="Envelopes of K function based on CSR", shade=c("hi", "lo"))
pc <- pcf(swedishpines)
plot(pc, main="Pair correlation function")
plot(swedishpines, main="nearest neighbours")
m <- nnwhich(swedishpines)
b <- swedishpines[m]
arrows(swedishpines$x, swedishpines$y, b$x, b$y,
angle=12, length=0.1, col="red")
plot(swedishpines %mark% (nndist(swedishpines)/2), markscale=1, main="Stienen diagram")
plot(Gest(swedishpines),
main=c("Nearest neighbour distance function G", "Gest(swedishpines)"),
legendmath=TRUE)
Z <- distmap(swedishpines, dimyx=512)
plot(swedishpines$window, main="Distance map")
plot(Z, add=TRUE)
points(swedishpines)
plot(Fest(swedishpines),
main=c("Empty space function F", "Fest(swedishpines)"),
legendmath=TRUE)
W <- rebound.owin(letterR, square(5))
plot(distmap(W), main="Distance map")
plot(W, add=TRUE)
a <- psp(runif(20),runif(20),runif(20),runif(20), window=owin())
contour(distmap(a), main="Distance map")
plot(a, add=TRUE,col="red")
plot(Jest(swedishpines), main=c("J-function", "J(r)=(1-G(r))/(1-F(r))"))
plot(allstats(swedishpines))
data(residualspaper)
Fig4b <- residualspaper$Fig4b
plot(Fig4b, main="Inhomogeneous point pattern")
plot(Kinhom(Fig4b), main="Inhomogeneous K-function")
plot(pcfinhom(Fig4b, stoyan=0.1), main="Inhomogeneous pair correlation")
data(bronzefilter)
X <- unmark(bronzefilter)
plot(X, "Bronze filter data")
lam <- predict(ppm(X, ~x))
plot(Kscaled(X, lam), xlim=c(0, 1.5), main="Locally-scaled K function")
data(bramblecanes)
plot(bramblecanes)
bramblecanes <- rescale(bramblecanes, 1/9)
plot(alltypes(bramblecanes, "K"), mar.panel=c(4,4,2,2)+0.1)
data(amacrine)
amacrine <- rescale(amacrine, 1/662)
plot(alltypes(amacrine, Lcross, envelope=TRUE, nsim=9), . - r ~ r, ylim=c(-25, 5))
data(ponderosa)
ponderosa.extra$plotit(main="Ponderosa Pines")
L <- localL(ponderosa)
pL <- plot(L, lty=1, col=1, legend=FALSE,
main="neighbourhood density functions for Ponderosa Pines")
parsave <- par(mfrow=c(1,2))
ponderosa.extra$plotit()
par(pty="s")
plot(L, iso007 ~ r, main="point B")
ponderosa.extra$plotit()
L12 <- localL(ponderosa, rvalue=12)
P12 <- ponderosa %mark% L12
Z12 <- smooth.ppp(P12, sigma=5, dimyx=128)
plot(Z12, col=topo.colors(128), main="smoothed neighbourhood density")
contour(Z12, add=TRUE)
points(ponderosa, pch=16, cex=0.5)
plot(amacrine, main="Amacrine cells data")
par(pty="s")
mkc <- markcorr(amacrine,
correction="translate", method="density",
kernel="epanechnikov")
plot(mkc, main="Mark correlation function", legend=FALSE)
par(parsave)
plot(alltypes(amacrine, markconnect),
title="Mark connection functions for amacrine cells")
parsave <- par(mfrow=c(1,2))
data(spruces)
plot(spruces, cex.main=0.75)
par(pty="s")
plot(markcorr(spruces), main="Mark correlation", legendpos="bottomright")
plot(spruces, cex.main=0.75)
plot(markvario(spruces), main="Mark variogram", legendpos="topright")
par(parsave)
plot(as.listof(list("Emark(spruces)"=Emark(spruces),
"Vmark(spruces)"=Vmark(spruces))),
main="Independence diagnostics", ylim.covers=0, legendpos="bottom")
if(enable3d) {
par3 <- par(mfrow=c(1,2))
X <- rpoispp3(100)
plot(X, main="3D point pattern X")
plot(K3est(X), main="K-function in 3D")
plot(X, main="3D point pattern X")
plot(G3est(X), main="G-function in 3D", legendpos="bottomright")
par(par3)
}
fanfare("VI. Model-fitting")
data(japanesepines)
plot(japanesepines)
fit <- ppm(japanesepines, ~1)
print(fit)
fit <- ppm(japanesepines, ~polynom(x,y,2))
print(fit)
plot(fit, how="image", se=FALSE, main=c("Inhomogeneous Poisson model",
"fit by maximum likelihood",
"Fitted intensity"))
plot(fit, how="image", trend=FALSE,
main="Standard error of fitted intensity")
data(redwood)
parsave <- par(mfrow=c(1,2))
plot(redwood)
fitT <- kppm(redwood, ~1, clusters="Thomas")
oop <- par(pty="s")
plot(fitT, main=c("Thomas model","fit by minimum contrast"))
plot(redwood)
plot(simulate(fitT)[[1]], main="simulation from fitted Thomas model")
plot(swedishpines)
fit <- ppm(swedishpines, ~1, Strauss(r=7))
print(fit)
plot(fit, how="image", main=c("Strauss model",
"fit by maximum pseudolikelihood",
"Conditional intensity plot"))
plot(swedishpines)
fit <- ppm(swedishpines, ~1, PairPiece(c(3,5,7,9,11,13)))
plot(fitin(fit), legend=FALSE,
main=c("Pairwise interaction model",
"fit by maximum pseudolikelihood"))
par(parsave)
Xsim <- rmh(model=fit,
start=list(n.start=80),
control=list(nrep=100))
plot(Xsim, main="Simulation from fitted Strauss model")
data(demopat)
demopat <- rescale(demopat, 8)
unitname(demopat) <- c("mile", "miles")
demopat
plot(demopat, cols=c("red", "blue"))
fit <- ppm(demopat, ~marks + polynom(x,y,2), Poisson())
plot(fit, trend=TRUE, se=TRUE)
fanfare("VII. Simulation")
data(letterR)
plot(letterR, main="Poisson random points")
lambda <- 10/area.owin(letterR)
points(rpoispp(lambda, win=letterR))
points(rpoispp(9 * lambda, win=letterR))
points(rpoispp(90 * lambda, win=letterR))
plot(rpoispp(100))
plot(rpoispp(function(x,y){1000 * exp(-3*x)}, 1000))
plot(rMaternII(200, 0.05))
plot(rSSI(0.05, 200))
plot(rThomas(10, 0.2, 5))
plot(rMatClust(10, 0.05, 4))
plot(rGaussPoisson(30, 0.05, 0.5))
plot(redwood, main="random thinning - rthin()")
points(rthin(redwood, 0.5), col="green", cex=1.4)
plot(rcell(nx=15))
plot(rsyst(nx=5))
abline(h=(1:4)/5, lty=2)
abline(v=(1:4)/5, lty=2)
plot(rstrat(nx=5))
abline(h=(1:4)/5, lty=2)
abline(v=(1:4)/5, lty=2)
X <- rsyst(nx=10)
plot(rjitter(X, 0.02))
Xg <- rmh(list(cif="geyer", par=list(beta=1.25, gamma=1.6, r=0.2, sat=4.5),
w=c(0,10,0,10)),
control=list(nrep=1e4), start=list(n.start=200))
plot(Xg, main=paste("Geyer saturation process\n",
"rmh() with cif=\"geyer\""))
plot(rpoisline(10))
plot(rlinegrid(30, 0.1))
L <- as.psp(matrix(runif(20), 5, 4), window=square(1))
plot(L, main="runifpointOnLines(30, L)")
plot(runifpointOnLines(30, L), add=TRUE, pch="+")
plot(L, main="rpoisppOnLines(3, L)")
plot(rpoisppOnLines(3, L), add=TRUE, pch="+")
spatstat.options(npixel=256)
X <- dirichlet(runifpoint(30))
plot(rMosaicSet(X, 0.4), col="green", border=NA)
plot(X, add=TRUE)
plot(rMosaicField(X, runif))
plot(rMosaicSet(rpoislinetess(3), 0.5), col="green", border=NA, main="Switzer's random set")
spatstat.options(npixel=100)
fanfare("VIII. Geometry")
data(letterR)
A <- letterR
B <- shift(letterR, c(0.2,0.1))
plot(bounding.box(A,B), main="shift", type="n")
plot(A, add=TRUE)
plot(B, add=TRUE, border="red")
B <- rotate(letterR, 0.2)
plot(bounding.box(A,B), main="rotate", type="n")
plot(A, add=TRUE)
plot(B, add=TRUE, border="red")
mat <- matrix(c(1.1, 0, 0.3, 1), 2, 2)
B <- affine(letterR, mat=mat, vec=c(0.2,-0.1))
plot(bounding.box(A,B), main="affine", type="n")
plot(A, add=TRUE)
plot(B, add=TRUE, border="red")
par1x2 <- par(mfrow=c(1,2))
L <- rpoisline(10, owin(c(1.5,4.5),c(0.2,3.6)))
plot(L, "Line segment pattern")
plot(L$window, main="L[window]", type="n")
plot(L[letterR], add=TRUE)
plot(letterR, add=TRUE, border="red")
par(par1x2)
a <- psp(runif(20),runif(20),runif(20),runif(20), window=owin())
plot(a, main="Self-crossing points")
plot(selfcrossing.psp(a), add=TRUE, col="red")
a <- as.psp(matrix(runif(20), 5, 4), window=square(1))
b <- rstrat(square(1), 5)
plot(a, lwd=3, col="green", main="project points to segments")
plot(b, add=TRUE, col="red", pch=16)
v <- project2segment(b, a)
Xproj <- v$Xproj
plot(Xproj, add=TRUE, pch=16)
arrows(b$x, b$y, Xproj$x, Xproj$y, angle=10, length=0.15, col="red")
plot(a, main="pointsOnLines(L)")
plot(pointsOnLines(a, np=100), add=TRUE, pch="+")
parry <- par(mfrow=c(1,3))
X <- tess(xgrid=seq(2, 4, length=10), ygrid=seq(0, 3.5, length=8))
plot(X)
data(letterR)
plot(letterR)
plot(intersect.tess(X, letterR))
X <- dirichlet(runifpoint(10))
plot(X)
L <- infline(0.3,0.5)
plot(owin(), main="L")
plot(L, col="red", lwd=2)
plot(chop.tess(X,L))
par(parry)
data(chorley)
W <- chorley$window
plot(W, main="simplify.owin")
WS <- simplify.owin(W, 2)
plot(WS, add=TRUE, border="green")
nopa <- par(mfrow=c(2,2))
data(letterR)
Rbox <- grow.rectangle(as.rectangle(letterR), 0.3)
v <- erode.owin(letterR, 0.25)
plot(Rbox, type="n", main="erode.owin", cex.main=0.75)
plot(letterR, add=TRUE, col="red", cex.main=0.75)
plot(v, add=TRUE, col="blue")
v <- dilate.owin(letterR, 0.25)
plot(Rbox, type="n", main="dilate.owin", cex.main=0.75)
plot(v, add=TRUE, col="blue")
plot(letterR, add=TRUE, col="red")
v <- closing.owin(letterR, 0.3)
plot(Rbox, type="n", main="closing.owin", cex.main=0.75)
plot(v, add=TRUE, col="blue")
plot(letterR, add=TRUE, col="red")
v <- opening.owin(letterR, 0.3)
plot(Rbox, type="n", main="opening.owin", cex.main=0.75)
plot(letterR, add=TRUE, col="red")
plot(v, add=TRUE, col="blue")
par(nopa)
fanfare("IX. Operations on pixel images")
plot(Z, main="An image Z")
plot(levelset(Z, 4))
plot(cut(Z, 5))
plot(eval.im(sqrt(Z) - 3))
plot(solutionset(abs(Z - 6) <= 1))
data(cells)
d <- distmap(cells, dimyx=256)
W <- levelset(d, 0.06)
nopa <- par(mfrow=c(1,2))
plot(W)
plot(connected(W))
par(nopa)
Z <- as.im(function(x,y) { 4 * x^2 + 3 * y }, letterR)
plot(Z)
plot(letterR, add=TRUE)
plot(blur(Z, 0.3, bleed=TRUE))
plot(letterR, add=TRUE)
plot(blur(Z, 0.3, bleed=FALSE))
plot(letterR, add=TRUE)
plot(blur(Z, 0.3, bleed=FALSE))
plot(letterR, add=TRUE)
par(oldpar)
fanfare("X. Programming tools")
showoffK <- function(Y, current, ..., fullpicture,rad) {
plot(fullpicture,
main=c("Animation using `applynbd'", "explaining the K function"))
points(Y, cex=2)
u <- current
points(u[1],u[2],pch="+",cex=3)
theta <- seq(0,2*pi,length=100)
polygon(u[1]+ rad * cos(theta),u[2]+rad*sin(theta))
text(u[1]+rad/3,u[2]+rad/2,Y$n,cex=3)
if(runif(1) < 0.2) Sys.sleep(runif(1, max=0.4))
return(Y$n)
}
applynbd(redwood, R=0.2, showoffK, fullpicture=redwood, rad=0.2, exclude=TRUE)
options(oldoptions)