Full_Name: Mike Prager Version: 2.2.1 OS: Windows XP with SP2 Submission from: (NULL) (205.156.36.17)
When several EPS files are made with one invocation of postscript(), only the first displays correctly in gsview. Examination of the generated eps files with a diff utility reveals that subsequent eps files lack the encoding vector definition and report page numbers higher than one. This causes (e.g.) gsview to fail when trying to display the subsequent files. My copy of the EPS specification does not prohibit %%Pages DSC comments higher than one, but since an EPS file is not allowed to have multiple pages, it seems inconsistent at least for the R-generated file to claim to be page 2 or that it contains more than one page. The lack of encoding vector definition causes font loading to fail when it the file later specifies WinAnsiEncoding (as it does by default). Therefore, it would be desirable for each generated eps file to include the encoding vector and to state that it is page 1 of 1 and that the number of pages is 1. (This can be worked around by closing the device between plots, thus making sure each EPS file is the first file.) The following example generates two files, the second of which is incompatible with gsview on Windows as described: ###################################################################### # epstest.r # M. H. Prager # Demonstrate (1) possible wrapper function for postscript() and # (2) problems with current EPS output # January 17, 2006 ###################################################################### eps <- function (...) { postscript(height = 5, width = 7, onefile = FALSE, horizontal = FALSE, paper = "special", file = "Rplot%03d.eps", ...) } eps() plot(1:5, rnorm(5)) plot(1:6, rnorm(6)) dev.off() # END OF EXAMPLE ###################################################################### In addition, although it is NOT a bug, I would like to request that a wrapper function like eps() above be included with the R distribution. This would save R-help readers from answering the same questions over and over. It would also make it easier for newcomers to use R for generating eps files. Consideration by the R Core Team would be appreciated. Thanks, ...Mike Prager ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel