[R] pie graphs in log scale axis
Ortiz, John
OrtizJ at si.edu
Mon Oct 28 14:40:51 CET 2013
Dear list users,
I'm doing a plot integrating Grid output with Base Graphics output (gridBase, Murrell 2012).
My goal is to produce a xy plot where each point is represented by a pie. I could get it using the attach code,
but now I want to change the X axis to log scale.
when I introduce the log="x" parameter in the line:
plot(x, y, xlim=c(0.1, 1.2), log="x", ylim=c(0.1, 1.2), type="n")
I get this warning!
vps <- baseViewports()
Warning message:
In baseViewports() : viewport scales NOT set to user coordinates
This is the code to produce it without introduce log scale yet:
library(grid)
library(gridBase)
x <- c(0.88, 1.00, 0.67, 0.34)
y <- c(0.87, 0.43, 0.24, 0.94)
z <- matrix(runif(4*2), ncol=2)
oldpar <- par(no.readonly=TRUE)
plot(x, y, xlim=c(0.1, 1.2), ylim=c(0.1, 1.2), type="n")
vps <- baseViewports()
pushViewport(vps$inner, vps$figure, vps$plot)
for (i in 1:4) {
pushViewport(viewport(x=unit(x[i], "native"),
y=unit(y[i], "native"),
width=0.1,
height=0.1))
par(plt=gridPLT(), new=TRUE)
pie(z[i,], radius=1, labels=rep("", 2))
popViewport()
}
popViewport(2)
par(oldpar)
Thanks by some advice!!
Regards,
John Ortiz
Geologist
Smithsonian Tropical Research Institute Panama
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