Problems with ggsave(type = "pdf") on Mac

[Brandon Farr]

This issue deals with ggsave. When using ggsave (type = "pdf") on a
Mac (see sessionInfo below), linetype = 5, or at least the fifth
linetype that ggplot chooses, gets lost in the save. The plot displays
properly onscreen in an R session, but does not display properly in
the pdf.

For an example of the pdf, see "ggsave_linetype_bug.pdf" in Files.

Thanks,
Brandon

<CODE>


# Code to illustrate missing line type 5 in legend
ctry <- rep(c("US","UK", "EU", "JP", "BR"), each = 5)
x <- (runif(25) - 1 * 5)
y <- (runif(25) - 1 * 5)

plotData <- data.frame(ctry, x, y, stringsAsFactors = FALSE)
sapply(plotData, class)


p1 <- qplot(x, y, data = plotData, geom="line", linetype = ctry)
ggsave(filename = "test.pdf", plot = p1)

# > sessionInfo()
# R version 2.8.1 (2008-12-22)
# i386-apple-darwin8.11.1
#
# locale:
# en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
#
# attached base packages:
# [1] grid stats graphics grDevices utils datasets
# [7] methods base
#
# other attached packages:
# [1] ggplot2_0.8.2 reshape_0.8.2 plyr_0.1.4 proto_0.3-8

[Mike Lawrence]

This also occurs with pdf():

pdf('test2.pdf',5,5)
p1
dev.off()

--
Mike Lawrence
Graduate Student
Department of Psychology
Dalhousie University

Looking to arrange a meeting? Check my public calendar:
http://tinyurl.com/mikes-public-calendar

~ Certainty is folly... I think. ~

[hadley wickham]

Hmmm, strange. It looks like it might be a bug with the pdf output on
a mac. Can anyone confirm that this happens on other platform as
well?

Hadley

--
http://had.co.nz/

[Mike Lawrence]

This *does* work on a mac:

pdf('test3.pdf',5,5)
plot(1:10,type='l',lty=5)
dev.off()

[Rainer Hurling]

On FreeBSD 8.0-CURRENT with R version 2.9.0 alpha (2009-03-29 r48242)
all five lines are plotted.

In the pdf file line type 5 is very very small on the main graphics and
not as small on the legend. So perhaps it exists on Mac and only is to
small to regocnize it?

Rainer Hurling

[Brandon Farr]

It could be that it is too small. I tried the same code, only
substituting the following:

p1 <- qplot(x, y, data = plotData, geom="line", linetype = ctry, size
= I(1))

ggsave(filename = "test.pdf", plot = p1)

The same problem occurs.

-Brandon

On Apr 5, 3:47 am, Rainer Hurling <rhur...@gwdg.de> wrote:
> On FreeBSD 8.0-CURRENT with R version 2.9.0 alpha (2009-03-29 r48242)
> all five lines are plotted.
>
> In the pdf file line type 5 is very very small on the main graphics and
> not as small on the legend. So perhaps it exists on Mac and only is to
> small to regocnize it?
>
> Rainer Hurling
>
> On 05.04.2009 00:43 (UTC+1), hadley wickham wrote:
>
> > Hmmm, strange.  It looks like it might be a bug with the pdf output on
> > a mac.  Can anyone confirm that this happens on other platform as
> > well?
>
> > Hadley
>

> > On Sat, Apr 4, 2009 at 8:53 AM, Mike Lawrence <Mike.Lawre...@dal.ca> wrote:
> >> This also occurs with pdf():
>
> >> pdf('test2.pdf',5,5)
> >> p1
> >> dev.off()
>

[Brandon Farr]

Hadley,

It does appear that the problem has to do with "on stretches" of
linetypes of length = 1. They are all lost in the pdf processing on
the Mac. I have reviewed the documentation and have figured out how to
define a manual scale. However, I can't figure out how to get just a
solid line, in addition to the dot-dash lines. See below.

# This works
linetypes <- c("82", "21", "42", "44", "4424", "6363")

p1 + scale_linetype_manual(values = linetypes)

# However, the following linetypes definitions don't work
linetypes <- c(NULL, "11", "31", "33", "3313", "4242")
linetypes <- c(NA, "11", "31", "33", "3313", "4242")
linetypes <- c("00", "11", "31", "33", "3313", "4242")

p1 + scale_linetype_manual(values = linetypes)

[hadley wickham]

Hi Brandon,

You want "solid":

linetypes <- c("solid", "11", "31", "33", "3313", "4242")

Hadley

--
http://had.co.nz/