At 09:58 18/12/2002 -0500, vous avez �crit:

Hello [R]ians,

  I'm hoping someone can clarify the difference between a Workspace Image
and Working Directory.  I created a directory on my PC, say,
"C:\Program Files\R\Project1" and then saved my objects in
"C:\Program Files\R\Project1\.Rdata".

Then, in a subsequent session, I reloaded these objects using

> load("C:/Program Files/R/Project1/.RData")

At first, I thought I was suppose to use

> setwd("C:\\Program Files\\R\\Project1")
This changes the working directory only for the current session.


and that R would automatically use "C:/Program Files/R/Project1/.RData".
But this appears not to be the case.
I got this impression from Section 1.11 of "An Introduction to R" which states
"...objects are written to a file called '.RData' in the current directory".

What "things" then, should go in the Workspace Image but not the Working Directory
and vice versa (Plots?), and what am I not understanding?
Under Windows, the most practical solution is to create a short-cut of Rgui.exe, right-click on it, and then modify the directory in the field "Start in:" under the tab "Short-cut". When started from this short-cut, R will use this directory as its working directory, and load any .RData if there is one there. You can then create as many short-cuts as you want, each with its own working directory.

Hope this helps.

Emmanuel Paradis

Gratefully Yours,

Iyue

-----------------------------------------
Iyue Sung, PhD
Ingenix , Epidemiology Division
-----------------------------------------

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