(Edited to add link to sample picture)
Simon Urbanek wrote:
On May 20, 2008, at 8:05 PM, [EMAIL PROTECTED] wrote:
Full_Name: Joseph Scandura
Version: 2.7.0
OS: Mac 10.5
Submission from: (NULL) (140.251.50.94)
Since updating to 2.7.0 all plots that use image() (heatmap, etc...)
now draw
visible boxes around each rectangle in the plot. When there are many
rectangles
the surrounding color becomes dominant over the rectangle color and
the overall
image is borderline useless.
Can you, please, specify exactly which graphics device you are using
and possibly a snapshot of the problem? I don't see any additional
boxes being drawn on any device.
I see lines at the borders of the grid used by image on my Mac (Tiger, R
2.7.0 Patched (2008-05-20 r45743)).
They are most visible in the last of the examples plotted by
example(image), the one that starts
image(x, y, volcano, col = terrain.colors(100), axes = FALSE). It opens
a Quartz device.
How do you do a snapshot on a Mac? I see online that it's Cmd-Shift-4,
and I get the snapshot click, but I don't know where the picture ended up.
AHA! It goes to the desktop.
Okay, a sample picture is available at
http://www.stats.uwo.ca/faculty/murdoch/temp/grid.png
Not as bad as Joseph was describing, but not nearly as good as Windows
produces ;-).
The only issue I'm aware of are anti-aliasing effects around the edges
of adjacent rectangles which don't fall on the pixel boundary (if anti-
aliasing device is used). Depending on the subpixel location of the
edge, the background color may shine through very slightly. It's not
what you describe, but it's closest to what I can imagine you could
mean. However, AFAICS this has not been changed recently and is a
rendering artifact which is hard to get rid of in the current setup as
devices are resolution-independent (the only cure I'm aware of [short
of disabling anti-aliasing] is to distort the original plot such that
rectangles are aligned with the pixels of the output medium).
I don't know if what I'm seeing is new or not; I've only got one R
version installed.
Duncan Murdoch
Cheers,
Simon
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
