baptiste.auguie at gmail.com
2009-Dec-11 14:30 UTC
[Rd] incorrect linetype with quartz device (PR#14129)
Full_Name: baptiste augui?
Version: 2.10.1 RC (2009-12-06 r50690)
OS: Mac OSX 10.5
Submission from: (NULL) (90.25.215.172)
The quartz() device, either in interactive use or with pdf file output, produces
an incorrect dashed line when the data is dense. Consider the following
comparison between quartz() and pdf(),
library(grid)
comparison <- function(N=10){
x = seq(0, 10, length=N)
y = cos(x)
output.quartz <- paste("quartz-", N,".pdf",
sep="")
output.pdf <- paste("pdf-", N,".pdf", sep="")
pdf(output.pdf, width=4, height=4)
pushViewport(viewport(xscale=c(0, 10), yscale=c(0, 6)))
for(ind in 1:5)
grid.lines(x, y+ind, gp=gpar(lty=ind),
default.units="native")
dev.off()
quartz(type="pdf", file=output.quartz,
width=4, height=4)
pushViewport(viewport(xscale=c(0, 10), yscale=c(0, 6)))
for(ind in 1:5)
grid.lines(x, y+ind, gp=gpar(lty=ind),
default.units="native")
dev.off()
}
comparison()
## the output is (almost, see PR#14128) identical
comparison(1e4)
## here the quartz output has non-homogeneous spacing
## depending on the slope of the data
## and the aspect ratio of the device
The same behavior is observed with R2.11.0 (2009-12-09 r50690)
sessionInfo()
R version 2.10.1 RC (2009-12-06 r50690)
i386-apple-darwin9.8.0
locale:
[1] en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8
attached base packages:
[1] grid stats graphics grDevices utils datasets methods
[8] base