[R-SIG-Mac] 2 questions: quartz(width) and another about image

[Rob J Goedman]

Hi Ken,

Just to summarize to the mailing list.

Question 1:

It almost looks as if this is an issue in the Apple pdf rendering. 
Acrobat Reader 7.0 shows the
same pdf file flawlessly, but the Quartz device and Apple's previewer 
show the grid lines
(they seem 1 pixel thick to me?).

I'll search/float that on the appropriate Apple alias and see if I 
find/get some feedback.

Question 2:

Thanks for bringing this up (and answering some additional questions I 
had!). I'll fix
this.

Rob



On Mar 4, 2005, at 12:50 AM, Ken Knoblauch wrote:

> Hi,
>
> I have two questions:
> 1) I'm using image() to recreate a set of checkerboard stimuli used by 
> a
> colleague in a color vision experiment (not to do the experiment
> but to show the stimulus in a talk in which I refer to his work).
> Here is the code for one of them:
>
> chkb8 <- matrix(rep(c(rep(c(1,2), 4), rep(c(2,1), 4)), 4), ncol = 8)
> chkb16 <- kronecker(chkb8, matrix(1, ncol=2, nrow=2))
> chkb16[6:11, 6:11] <- 1
> chkb16[8:9,8:9] <- 3
> image(chkb16, axes=FALSE,col=c("red","green","yellow"))
>
> This works but if I display it in a quartz device, there are fine 
> horizontal
> and vertical lines in the image, which are not there if I use x11().
> Interestingly, when I save the image with the pdf() device, I
> get the lines if I open the pdf file with TeXShop but not Acrobat 
> Reader.
> If I import the image to Keynote, I get the lines from the TeXShop
> export but not Acrobat.  The solution is evidently to use the Acrobat
> export but why do these lines appear in the rendition with the quartz
> device? and is there an easy fix to eliminate them?
>
> 2)  I've noticed for awhile that the width and height commands do not 
> work
> (for me) for the quartz device for the daily versions of the Cocoa 
> gui, though
> they do on the version that comes with the R 2.0.1 binary installation.
>
> I would be grateful for any enlightenment.  Thank you.
>
> platform powerpc-apple-darwin6.8
> arch     powerpc
> os       darwin6.8
> system   powerpc, darwin6.8
> status
> major    2
> minor    0.1
> year     2004
> month    11
> day      15
> language R
>
> best,
>
> ken
>
> ____________________
> Ken Knoblauch
> Inserm U 371
> Cerveau et Vision
> 18 avenue du Doyen Lepine
> 69675 Bron cedex
> France
> tel: +33 (0)4 72 91 34 77
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> portable: 06 84 10 64 10
>
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