On Fri, 18 Jun 2004, Patrick Connolly wrote: > On Thu, 17-Jun-2004 at 08:00AM -0700, Thomas Lumley wrote: > > |> On Wed, 16 Jun 2004, Prof Brian Ripley wrote: > |> > |> > You will have to tell us more. Exporting how: to what format using what > |> > device and what exact command on what operating system? > |> > > |> > The only device I know of that even knows about dpi is bitmap() and that > |> > has no such limit unless imposed by your implementation of ghostscript. > |> > |> There is an issue with PNG. libpng provides png_set_pHYs to set resolution > |> (in pixels/metre) but provides a default if it is not set. We don't set > |> it, and so get the default resolution. > > > I don't follow. Is that in relation to the function bitmap() or to > png()?
png(). That records a nominal 72dpi in the info, although it isn't much used even by PhotoShop/GIMP etc. (Almost all digital cameras record JPEGs set to 72dpi, for example. If you want to use such a program to resize to a physical size it is very easy to edit their idea of the dpi.) The original question was about a 96dpi limit and I still await elucidation of what that was about. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
