Hi Mark, Mark W Kimpel <mkimpel at="" iupui.edu=""> writes: > Not sure if this is an R or BioC question so will cross-post. Please pick one or the other. I'm replying on BioC only. > I cannot extract R code from vignettes because system.file("doc", > "my.bioc.package") returns "". try rereading the help page for system.file. Because the first arg to system.file is '...', you need to name your arguments: > system.file("doc", "Biobase") [1] "" > system.file("doc", package="Biobase") [1] "/Users/seth/RLIB/2.6/Biobase/doc" And this is shown in the example on the webpage you found... + seth -- Seth Falcon | Computational Biology | Fred Hutchinson Cancer Research Center BioC: http://bioconductor.org/ Blog: http://userprimary.net/user/