R help - May 2008 - 2.7.0 graphics changes and png devices

Hi,

I have a question about the graphics changes in 2.7.0.  The example is
this bit of code:

par(mfcol = c(2, 3))
for(i in 1:6) plot(1:10, 1:10, xlab = "xlab", ylab = "ylab",
main = "main")

In 2.7.0, if I do this interactively (using windows()), I get bold
titles.  If I do this through a png device, I get regular weight
titles.  If I do this in 2.6.2, both situations give bold titles.

I assume the 2.7.0 png device is off here, but I'm not sure how to fix
this.  Suggestions?

Oliver

Apologies for the double-post, but I figured I should be slightly more
specific.  I'm using the windows version of 2.7.0 and 2.6.2.  My calls
to png is simply png("2.7.0.png") and png("2.6.2.png"),
respectively,
followed by the appropriate dev.off().

Oliver


On 5/19/08, Oliver Soong <osoong at gmail.com>
wrote:
> Hi,
>
> I have a question about the graphics changes in 2.7.0.  The example is
> this bit of code:
>
> par(mfcol = c(2, 3))
> for(i in 1:6) plot(1:10, 1:10, xlab = "xlab", ylab =
"ylab", main = "main")
>
> In 2.7.0, if I do this interactively (using windows()), I get bold
> titles.  If I do this through a png device, I get regular weight
> titles.  If I do this in 2.6.2, both situations give bold titles.
>
> I assume the 2.7.0 png device is off here, but I'm not sure how to fix
> this.  Suggestions?
>
> Oliver
>

The titles are in bold.  Because the text is small, the weight is lower 
than in full-sized plots.

The difference from 2.6.2 is that the text is correctly sized for the 
default 72dpi plots.  Try something like

png(width=7, height=7, units="in", res=96)

for comparability with windows().

On Mon, 19 May 2008, Oliver Soong wrote:
> Hi,
>
> I have a question about the graphics changes in 2.7.0.  The example is
> this bit of code:
>
> par(mfcol = c(2, 3))
> for(i in 1:6) plot(1:10, 1:10, xlab = "xlab", ylab =
"ylab", main = "main")
>
> In 2.7.0, if I do this interactively (using windows()), I get bold
> titles.  If I do this through a png device, I get regular weight
> titles.  If I do this in 2.6.2, both situations give bold titles.
>
> I assume the 2.7.0 png device is off here, but I'm not sure how to fix
> this.  Suggestions?
>
> Oliver
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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