workspace vs. image
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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