Karl, dev2bitmap runs its output through Ghostscript, and I assume that the difference is somehow due to that. I can't say whether Ghostscript is decreasing the file quality or just doing something clever, though.
Jonathan On Wed, Jun 30, 2010 at 10:30 AM, Karl Brand <k.br...@erasmusmc.nl> wrote: > Thank you Erik! > > That works nicely now. The file size in (in kilobytes) is equal to the > "File>Save As>PDF" method. > > Still curious why the file sizes (in Kb), differ by a factor of ~2 between > the two methods: > > pdf() > dev2bitmap(method = "pdf") > > I'm just *assuming* here that file size is inidcative of image quality. Is > this assumption correct? If so, how would one increase .pdf quality within > the dev2bitmap() function? > > With thanks for any further thoughts on this, cheers, > > Karl > > > > > On 6/30/2010 4:58 PM, Erik Iverson wrote: > >> >> >>> Method 3: >>> > pdf(file="my_plot.pdf", paper="a4") >>> > dev.off() >>> >> >> The `pdf` function opens a *new* graphics device, you then send output >> to the device before calling dev.off(), e.g., >> >> pdf(file = my_plot.pdf") >> plot(1:10, 1:10) >> dev.off() >> >> >> >>> -yields a .pdf file of 1kb (same plot example) and returns the >>> following error when attempting to open with Adobe acrobat: >>> >>> "There was an error opening this document. This file cannot be opened >>> because it has no pages." >>> >> > -- > Karl Brand <k.br...@erasmusmc.nl> > Department of Genetics > Erasmus MC > Dr Molewaterplein 50 > 3015 GE Rotterdam > P +31 (0)10 704 3409 | F +31 (0)10 704 4743 | M +31 (0)642 777 268 > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
