On Aug 1, 2010, at 10:42 PM, Nadeem Faiz wrote:
Hello
I wanted to post a reply to the message from Tiago R Magalhaes
tiago17 at socrates.Berkeley.EDU .
I had a need to save a R graph as jpeg file. Found Tiago's message
very helpful. However the exact sequence of commands did not work
me. In the interest of adding to this topic, here is what I had to
do to save a R plot to a jpeg format file.
R version: 2.10.1OS: Mac OS Snow Leopard (10.6.3)HW: Mac Mini
Step 1) declare file name and file format in quartz() function.
quartz(title="your plot title", file="your_plot.jpg", type="jpeg")
If I were trying to create a jpg file, the first function I would try
would be ... jpeg(), although the quartz help page does indicate that
a wide variety of formats are supported through quartz().
> jpeg(file="test.jpg") # the "title=" argument is ignored if you
are plotting to a file
> plot(1,1)
> dev.off()
quartz
2
Step 2) create the plot as desired, for example
plot(1:10)
Step 3) save the plot to the file specified in step 1.
dev.off()
I did not find a lot of information online on this topic. Hope this
helps others,
NadeemDelaware ,USA
It is a bit of a puzzle to read this. Have you looked at the help
pages for:
?quartz
?pdf
?Devices # ???
As well as following the links from those pages? Surely one should not
be relying on a 6 year old R-SIG-Mac posting to get information about
Mac OSX graphics devices in 2010.
--
David.
Tiago R Magalhaes tiago17 at socrates.Berkeley.EDU
Thu Dec 9 17:58:25 CET 2004Previous message: [R-SIG-Mac] saving
graphs; jpeg(), bitmap()Next message: [R-SIG-Mac] summary: MacOSX,
Panther; save graphs, jpg(), pdf(), bitmap(), Ghostscript, X11
serverMessages sorted by: [ date ] [ thread ] [ subject ]
[ author ]So after taking some time and bothering some people
(Thanks very much
to all of them: Simon Urbanek, Rob J Goedman, Stefano Iacus, Byron
Ellis, Elijah Wright, Denis Chabot, Nathan Weisz) I solved the
problem.
I decided to write this summary. It's kind of long, but it might be
helpeful to someone else.
Two problems: installation and knowledge on how to use R. This is
valid for Panther 10.3.6, R 2.01 in a PowerBookG4.
I) Installation
X11 server has to be running. Go to Misc, Run X11 Server. You have to
have X11 installed in your computer. Some Macs don't have it
installed. It's on the 3rd CD. You can also download it from:
http://www.apple.com/macosx/features/x11/download/
2) Saving graphs:
jpeg(), png(), pdf()
a) You have to have X11 running. Go to Misc, RunX11 server, let X11
opened, don't close it.
b)to save a file you first have to open a device.
this was confusing to me, so let me be clear for other people like
myself (supposing I am not the only one having this problem...).
jpeg() and png() pdf() are NOT used to save plots AFTER the plots are
done. That's not what they do.
example:
jpeg("myfile.jpg") #opens a device - saves a file in your directory
but it has 0 Kb
plot(1:10) #places the plot in the device - still 0 Kb
file in your directory
dev.off() #closes the device and saves the contents
of the plot in file.
#you now have a file
3) there is another way to save graphs:
bitmap()
for that you need to have Ghostscript installed. I dowloaded
Ghostscript, but using bitmap() sill does't work, it still can't find
Ghostscript, I don't know where I have to install it, but I don't
really need it.
General considerations:
a) It's always possible to save pdfs files from the active device on
the menu: file > save
b) cut and paste also works
c) pdfs are wonderful for graphs and lines. I was surprised by the
quality and the small size of the file. Another show of my ignorance.
d) I am very surprised that this has not been an issue. I think the
functions are not very intuitive and the help pages, although clear
NOW, didn't help me that much when I first read them.
e) I'm curious about this on windows. Do they also go through this
device process?
f) you people are wonderful. Thanks for all the support and the help
that I have had. It was a little time consuming but I've learned a
lot in the process.
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