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windows nt/access other directories/ attach/system

2 messages · S.McClatchie, Brian Ripley

Original
S.McClatchie
# 
Colleagues

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System info:
R version rw1022 on NT
ESS v. 5.1.18 using emacs ver. 20.4

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As recommended, I keep separate directories for projects, but also use 
separate sub-directories for types of data (e.g. different oceanographic 
instruments) within projects. 

My problem is that I often need to access the objects and data (not 
stored as objects) in more than one directory.

I understand (mistakenly?) that at present you cannot use attach() with 
directories, just with objects and packages. Also I think 
system("command") is for the UNIX environment. System("cd ..") gives 
me an error under Windows NT. Obviously it is inconvenient to quit R and 
restart in the other directory, and messy to combine the "instrument sub-
directories" into a giant "project directory".

Do you have a suggestion of how to proceed, other than keeping my 
data as objects (I generally prefer to keep my data as text files so I can 
access them with Matlab when I need to).

Help will be appreciated.
Thanks

Sam

Sam McClatchie, Research scientist (fisheries acoustics))))))))))
NIWA (National Institute of Water & Atmospheric Research Ltd)
PO Box 14 901, Kilbirnie, Wellington, New Zealand
s.mcclatchie at niwa.cri.nz 

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Brian Ripley
#
On Fri, 1 Jun 2001, S.McClatchie wrote:

            

      
      
      
    

        
attach only concerns the search path for objects.

            

      
      
      
    

        
False.  system() is also under NT, and if cd is in your path under NT it
works.  It just doesn't (NT or Unix) change directory for the R process.

            

      
      
      
    

        
Try help(setwd).  Or use the File | Change dir menu item on Rgui.

            

      
      
      
    

        
Help files with alias or title matching `directory':
Type `?FOO' to inspect entry `FOO(PKG) TITLE'.

getwd(base)        Get or Set Working Directory
list.files(base)   List the Files in a Directory/Folder
R.home(base)       Return the R Home Directory
RHOME(base)        R Home Directory

might have been helpful.