I'm new to R and learning so I probably don't have much of value to share,
but I do use Windows and kUbuntu interchangeably and need to share code
across these two platforms, so let me tell you what I've found -- it may
or may
not help you.
Most of the R packages can be used on any platform. So you don't usually
need to worry about your syntax being os-specific. But there are
exceptions. When I run into exceptions, i usually use a conditional
statement (see below).
I find it very useful to store commonly used paths into an environment
file. I have an environment file for each OS. These are my settings. I
comment out the Linux section for Windows and vice versa:
---------------------
# Windows .Renviron
R_LIBS="C:/Program Files/RStudio/R/library"
R_LIBS_USER="C:/R/library"
R_USER="C:/R"
R_DOC_DIR="C:/R"
HOME="C:"
# Linux Renviron.site
# R_LIBS_USER="~/R/library"
# R_USER="~/R"
# R_DOC_DIR="~/R"
# HOME="/home/patrick" # may not be needed, check your system
----------------------------
You'll need to figure out where to store them on your system.
Having defined my home directories this way, relative paths can be used.
If you need to create a specific path, one approach is to use:
paste0(.Platform$file.sep,"directoryname")
I am vaguely aware that there contexts in which it doesn't work (maybe
DOS), so you'll need to test if you can construct the file path using the
paste0 function and Platform$file.sep
I typically write conditional statements for things that are
platform-specific. To illustrate with a simple example: to define the
current directory, you can do this:
### Define directories, note the path does not end with a slash /
if(.Platform$OS.type == "windows"){
currentdir <- "c:/R"
} else {
currentdir <- "~/R"}
setwd(currentdir)
rm(currentdir)
These may not be great but they have worked for me so far.
Patrick.
On Tue, 02 Apr 2013 17:42:01 +0800, Asis Hallab <asis.hal...@gmail.com>
wrote:
Dear R experts,
I hope everyone has had a happy easter break.
Recently my work included writing R function that need to call external
tools.
I did this using R's system function for example:
system( paste( 'tool', '-input', path_to_input, '-output',
path_to_output, '-other_switch', some_val ) )
I have two question about this:
1) Is there a way to implement such calls to external tools, so they
become platform independent? I mean, so that these calls will work
both on a *nix and a Windows system?
2) Is there a way to generate platform independent paths? So that
"path/2/input.tbl" on *nix systems becomes "path\2\input.tbl" on a
Windows system?
Your help will be much appreciated!
Kind regards!
______________________________________________
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PLEASE do read the posting guide
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--
Patrick Toche.
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
