Dear R, Usually when I want to read pdf help for R functions under Linux, I do the following steps
help("par",help_type="pdf")
system(paste(getOption("pdfviewer"),"par.pdf"))
which works well. First question, can I let "help" to save the pdf file to a different place other than current working directory? Now I want to write a small function to do the above together.
viewpdfhelp <- function(topic, reader = getOption("pdfviewer"))
+ {
+ genpdf <- help(topic = topic, help_type = "pdf") # save pdf file
+ pdffile <- paste(topic, ".pdf", sep = "") # the pdf file name
+ system(paste(reader, pdffile)) #call the viewer
+ }
viewpdfhelp("options")
To my surprise "help" does not generate the pdf file at all this time. Can someone tell me what's going wrong here? Many thanks!
sessionInfo()
R version 2.13.0 (2011-04-13) Platform: x86_64-unknown-linux-gnu (64-bit) locale: [1] LC_CTYPE=en_US.utf8 LC_NUMERIC=C [3] LC_TIME=en_US.utf8 LC_COLLATE=en_US.utf8 [5] LC_MONETARY=C LC_MESSAGES=en_US.utf8 [7] LC_PAPER=en_US.utf8 LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C [11] LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base loaded via a namespace (and not attached): [1] tools_2.13.0
Feng Li Department of Statistics Stockholm University 106 91 Stockholm, Sweden http://feng.li/