[R] setwd in windows

Troels Ring tring at gvdnet.dk
Fri Jul 14 14:06:29 CEST 2017

Fine - no nothing is wrong with setwd("./secdir") but I got the other 
code with the tilde as a supplementum and wondered why I couldn't make 
it work. I believe R_USER was successfully renamed - and per the faq 
thought it should work as specified.

Small problem though


Den 14-07-2017 kl. 13:54 skrev peter dalgaard:
> I am not sure what is going on here. The example seems incomplete. At any rate:
> (a) I would be wary of changing my home directory mid-session. That is usually just not done.
> (b) For a relative directory change, is anything wrong with setwd("./secdir") ?
> -pd
>> On 14 Jul 2017, at 13:42 , Troels Ring <tring at gvdnet.dk> wrote:
>> Dear friends - windows R 3.3.3 - sorry to ask a simple question - but I
>> cannot make setwd work properly in scripts
>> In the example below I have made a directory in C (firstdir) and a
>> directory in that (secdir) and the intention is to change directory to
>> the second from the first - it works when I put the entire path but not
>> the tilde - what am I missing? I was around rwf 2.14 as per the help to
>> setwd - to define the HOME - and redefine it. As I read 2.14 R_USER is
>> used for HOME when set. To no avail.
>> Best wishes
>> Troels
>> getwd()
>> #[1] "C:/firstdir"
>>   Sys.getenv("R_USER")
>> #"C:\\Users\\Bruger\\Documents"
>> dir()
>> #[1] "chdir.R" "secdir"
>> setwd("~/secdir")
>> error in setwd("~/secdir") : cannot change working directory
>> setwd("C:/firstdir/secdir")
>> getwd()
>> #"C:/firstdir/secdir"
>> setwd("C:/firstdir")
>> Sys.setenv(R_USER = "C:/firstdir")
>> Sys.getenv("R_USER")
>> setwd("~/secdir")
>>       2.14 What are HOME and working directories?
>> Several places in the documentation use these terms.
>> The working directory is the directory from which|Rgui|or|Rterm|was
>> launched, unless a shortcut was used when it is given by the ‘Start in’
>> field of the shortcut’s properties. You can find this from R code by the
>> call|getwd()|.
>> The home directory is set as follows: If environment variable|R_USER|is
>> set, its value is used. Otherwise if environment variable|HOME|is set,
>> its value is used. After those two user-controllable settings, R tries
>> to find system-defined home directories. It first tries to use the
>> Windows "personal" directory (typicallyC:\Users\username\Documents). If
>> that fails, if both environment variables|HOMEDRIVE|and|HOMEPATH|are set
>> (and they normally are), the value is${HOMEDRIVE}${HOMEPATH}. If all of
>> these fail, the current working directory is used.
>> 	[[alternative HTML version deleted]]
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