[R] which one give clear picture-pdf, jpg or tiff?

[Gavin Simpson]

On Fri, 2010-08-20 at 10:54 +0100, Ted.Harding at manchester.ac.uk wrote:
> On 20-Aug-10 09:24:17, Gavin Simpson wrote:
> > On Thu, 2010-08-19 at 20:32 -0700, Roslina Zakaria wrote:
> >> Hi,
> >> 
> >> I need some opinion. I would like to use graph that I generate
> >> from R code and save it into word document. Whichformat is better?
> >> pdf, jpeg or tiff?
> > 
> > Not that I have used word for a while myself, but when I did EPS
> > files were my preferred format for Word docs that were to be printed
> > or converted to PDF. The only downside is that Word's EPS importer
> > displays a low resolution bitmap image of the EPS in the document
> > so things look pretty sketchy on screen. When printed, however,
> > EPS images will provide top quality. To achieve the same quality
> > with JPEG or TIFF would require a much larger image file and
> > consequently a much larger final document.
> > I still send my Word-using colleagues EPS files for papers we are
> > writing etc.
> > 
> > ?postscript for the options needed to produce correct EPS.
> > 
> > HTH
> > G
> 
> I agree with Gavin about the relative merits of EPS and any bit-mapped
> format (such as jpeg or tiff). And also with Tim Gruene's earlier
> comment that "MS product are a little ignorant of PostScript and PDF":
> not only ignorant, but do not want to know!
> 
> However, a further comment about "Word's EPS importer": You will
> only see on screen that "low resolution bitmap image of the EPS"
> when viewing the Word document IF the EPS file is in fact EPSI,
> i.e. it includes a "header" as PostScript Comments in the initial
> section which codes that bitmap for "preview" purposes. EPS files,
> *as such*, by default do not include this, and then you would only
> see on screen the outline box with nothing inside it. (The only
> requirement for a PS file to be EPS is the presence in the Comments
> of a "%%BoundingBox: ..." line).
> 
> There is nothing about this that I can see in '?postscript', and
> running a test using
>   postscript("testEPS.eps")

Don't you need onefile = FALSE in that call? An EPS should only contain
a single "page" or image.

Back in the day, when I was using word and R, R's EPS files were
imported without the preview (as R doesn't generate one). Later on, a
low resolution bitmap was being displayed. I presumed this was because I
was using a newer version of office. I generate EPS using
postscript(..., onefile = FALSE) and with no further processing, my
colleagues see the low res bitmap in Word.

Like I said, I don't use Word any more and am writing this from a Linux
box so can't check but that is my experience from working with
colleagues who do use Word.

G 

>   plot(...)
>   dev.off()
> produced an EPS file with no such EPSI inclusion.
> 
> There are PostScript-handling program suites, such as ghostscript,
> which include a facility to convert from EPS to EPSI: in particular,
> ghostscript has the command ps2epsi.
> 
> Ted.
> 
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> Date: 20-Aug-10                                       Time: 10:54:33
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