poor quality png/tiff/pdf on mac
Thanks Colin, It appears I have an older version of lipng which won't allow type="cairo"/"Xlib". Need to ugrade, Mark
On Wed, Nov 5, 2014 at 6:13 AM, Marc Schwartz <marc_schwartz at me.com> wrote:
Hi, I am presuming that the PNG file that was attached to the original post by Mark is a screen cap and not the original file created by R. If so, you might review the following R FAQ: http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-are-there-unwanted-borders Regards, Marc Schwartz
On Nov 5, 2014, at 2:24 AM, Colin A. Smith <colin at colinsmith.org> wrote: Hi Mark, I assume you?re using a Mac. This problem comes from the way Quartz
renders immediately adjacent filled polygons. To get around it, you can add type=?cairo? or type=?Xlib? as an argument to the tiff, png, or jpeg call. If you really want to make a PDF, I can post those instructions to the list, but it is a bit more involved and uses some custom code I?ve written.
Cheers, Colin PS: I would avoid cross-posting to multiple lists in the future. That?s
generally frowned upon.
On Nov 5, 2014, at 4:14, M P <mzp3769 at gmail.com> wrote: Hello, I cannot fix image quality e.g. generated with filled.contour().
Whether I use tiff, png, jpeg, or pdf I always see vertical and horizontal lines at every grid increment on the plots like the attached. There is no problem when I plot in x11.
How to fix that? Thanks, Mark