165 lines
6.1 KiB
R
165 lines
6.1 KiB
R
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require(grid)
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old.prompt <- devAskNewPage(TRUE)
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## store current settings, to be restored later
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old.settings <- trellis.par.get()
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## changing settings to new 'theme'
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trellis.par.set(theme = col.whitebg())
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## simulated example, histogram and kernel density estimate superposed
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x <- rnorm(500)
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densityplot(~x)
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histogram(x, type = "density",
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panel = function(x, ...) {
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panel.histogram(x, ...)
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panel.densityplot(x, col = "brown", plot.points = FALSE)
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})
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## Using a custom panel function to superpose a fitted normal density
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## on a Kernel Density Estimate
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densityplot( ~ height | voice.part, data = singer, layout = c(2, 4),
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xlab = "Height (inches)",
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ylab = "Kernel Density\n with Normal Fit",
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main = list("Estimated Density", cex = 1.4, col = "DarkOliveGreen"),
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panel = function(x, ...) {
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panel.densityplot(x, ...)
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panel.mathdensity(dmath = dnorm,
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args = list(mean=mean(x),sd=sd(x)))
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} )
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## user defined panel functions and fonts
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states <- data.frame(state.x77,
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state.name = dimnames(state.x77)[[1]],
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state.region = factor(state.region))
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xyplot(Murder ~ Population | state.region, data = states,
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groups = state.name,
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panel = function(x, y, subscripts, groups)
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ltext(x = x, y = y, labels = groups[subscripts],
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cex=.9, fontfamily = "HersheySans", fontface = "italic"),
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par.strip.text = list(cex = 1.3, font = 4, col = "brown"),
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xlab = list("Estimated Population, July 1, 1975", font = 2),
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ylab = list("Murder Rate (per 100,000 population), 1976", font = 2),
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main = list("Murder Rates in US states", col = "brown", font = 4))
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##graphical parameters for xlab etc can also be changed permanently
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trellis.par.set(list(par.xlab.text = list(font = 2),
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par.ylab.text = list(font = 2),
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par.main.text = list(font = 4, col = "brown")))
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## Same with some multiple line text
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levels(states$state.region) <-
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c("Northeast", "South", "North\n Central", "West")
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xyplot(Murder ~ Population | state.region, data = states,
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groups = as.character(state.name),
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panel = function(x, y, subscripts, groups)
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ltext(x = x, y = y, labels = groups[subscripts], srt = -50, col = "blue",
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cex=.9, fontfamily = "HersheySans"),
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par.strip.text = list(cex = 1.3, font = 4, col = "brown", lines = 2),
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xlab = "Estimated Population\nJuly 1, 1975",
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ylab = "Murder Rate \n(per 100,000 population)\n 1976",
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main = "Murder Rates in US states")
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##setting these back to their defaults
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trellis.par.set(list(par.xlab.text = list(font = 1),
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par.ylab.text = list(font = 1),
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par.main.text = list(font = 2, col = "black")))
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##levelplot
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levelplot(volcano, colorkey = list(space = "top"),
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sub = "Maunga Whau volcano", aspect = "iso")
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## wireframe
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wireframe(volcano, shade = TRUE,
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aspect = c(61/87, 0.4),
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screen = list(z = -120, x = -45),
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light.source = c(0,0,10), distance = .2,
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shade.colors.palette = function(irr, ref, height, w = .5)
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grey(w * irr + (1 - w) * (1 - (1-ref)^.4)))
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## 3-D surface parametrized on a 2-D grid
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n <- 50
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tx <- matrix(seq(-pi, pi, length.out = 2*n), 2*n, n)
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ty <- matrix(seq(-pi, pi, length.out = n) / 2, 2*n, n, byrow = T)
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xx <- cos(tx) * cos(ty)
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yy <- sin(tx) * cos(ty)
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zz <- sin(ty)
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zzz <- zz
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zzz[,1:12 * 4] <- NA
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wireframe(zzz ~ xx * yy, shade = TRUE, light.source = c(3,3,3))
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## Example with panel.superpose.
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xyplot(Petal.Length~Petal.Width, data = iris, groups=Species,
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panel = panel.superpose,
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type = c("p", "smooth"), span=.75,
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col.line = trellis.par.get("strip.background")$col,
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col.symbol = trellis.par.get("strip.shingle")$col,
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key = list(title = "Iris Data", x = .15, y=.85, corner = c(0,1),
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border = TRUE,
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points = list(col=trellis.par.get("strip.shingle")$col[1:3],
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pch = trellis.par.get("superpose.symbol")$pch[1:3],
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cex = trellis.par.get("superpose.symbol")$cex[1:3]
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),
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text = list(levels(iris$Species))))
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## non-trivial strip function
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barchart(variety ~ yield | year * site, barley, origin = 0,
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layout = c(4, 3),
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between = list(x = c(0, 0.5, 0)),
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## par.settings = list(clip = list(strip = "on")),
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strip =
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function(which.given,
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which.panel,
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factor.levels,
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bg = trellis.par.get("strip.background")$col[which.given],
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...) {
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axis.line <- trellis.par.get("axis.line")
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pushViewport(viewport(clip = trellis.par.get("clip")$strip,
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name = trellis.vpname("strip")))
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if (which.given == 1)
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{
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grid.rect(x = .26, just = "right",
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name = trellis.grobname("fill", type="strip"),
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gp = gpar(fill = bg, col = "transparent"))
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ltext(factor.levels[which.panel[which.given]],
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x = .24, y = .5, adj = 1,
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name.type = "strip")
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}
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if (which.given == 2)
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{
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grid.rect(x = .26, just = "left",
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name = trellis.grobname("fill", type="strip"),
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gp = gpar(fill = bg, col = "transparent"))
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ltext(factor.levels[which.panel[which.given]],
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x = .28, y = .5, adj = 0,
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name.type = "strip")
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}
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upViewport()
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grid.rect(name = trellis.grobname("border", type="strip"),
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gp =
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gpar(col = axis.line$col,
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lty = axis.line$lty,
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lwd = axis.line$lwd,
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alpha = axis.line$alpha,
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fill = "transparent"))
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}, par.strip.text = list(lines = 0.4))
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trellis.par.set(theme = old.settings, strict = 2)
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devAskNewPage(old.prompt)
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