1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
"bubble" <- function (obj, zcol = 1, ..., fill = TRUE, maxsize = 3, do.sqrt = TRUE,
pch, col = c(2, 3), key.entries = quantile(data[,zcol]),
main = ifelse(is.numeric(zcol), names(data)[zcol], zcol),
identify = FALSE, labels = row.names(data.frame(obj)), key.space = "right",
scales = list(draw = FALSE), xlab = NULL, ylab = NULL, panel = panel.bubble,
sp.layout = NULL)
{
obj = as(obj, "SpatialPointsDataFrame")
data = as.data.frame(obj)
cc = coordinates(obj)
x = cc[, 1]
y = cc[, 2]
if (NCOL(data) == 1)
z = data
else if (NCOL(data) == 0)
z = rep(1, NROW(cc))
else
z = data[, zcol]
if (missing(pch))
pch = ifelse(fill, 16, 1)
if (length(col) == 1)
col = rep(col, 2)
z.col = as.vector(ifelse(z < 0, col[1], col[2]))
q = key.entries
q.pch = rep(pch, length(q))
q.text = as.character(round(q, 3))
q.col = as.vector(ifelse(q < 0, col[1], col[2]))
az = abs(z)
q = abs(q)
if (do.sqrt) {
az = sqrt(az)
q = sqrt(q)
}
cex = as.vector(maxsize * az/max(az,q))
q.cex = as.vector(maxsize * q/max(az,q))
if (identify) {
plot(x, y, asp = 1, cex = cex, main = main, ...)
return(identify(x, y, labels))
} else {
key = list(space = key.space, points = list(pch = q.pch, col = q.col,
cex = q.cex), text = list(q.text))
xyplot(y ~ x, col = z.col, cex = cex, pch = pch, asp = mapasp(obj),
key = key, main = main, scales = scales, xlab = xlab, ylab = ylab,
panel = panel, sp.layout = sp.layout, ...)
}
}
panel.bubble = function(x, y, subscripts, sp.layout, ...) {
sp.panel.layout(sp.layout, panel.number())
panel.xyplot(x, y, ...)
}
|
