[R] execution of source() command

From: Rainer M Krug <rkrug_at_sun.ac.za>
Date: Fri 15 Sep 2006 - 07:32:14 GMT


Linux SuSE 10

platform       i686-pc-linux-gnu
arch           i686
os             linux-gnu
system         i686, linux-gnu
major          2
minor          3.1
year           2006
month          06
day            01
svn rev        38247
language       R

version.string Version 2.3.1 (2006-06-01)

I have two questions concerning the source("test.R") command. 1) Is there any command which I can put into the test.R script file which aborts the execution of the script? At the moment I use

if (FALSE)


which is not elegant, but it works. I would prefer something like:


2) When I call source("test.R") and it is running for some time. Does changing the file test.R while it is executed change the execution, i.e.  does the call of source() load the script file into memory and parses and executes it from there or does it parse and execute the file on the disk?

Thanks in advance,


Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
Biology (UCT)

Department of Conservation Ecology and Entomology
University of Stellenbosch
Matieland 7602
South Africa

Tel:		+27 - (0)72 808 2975 (w)
Fax:		+27 - (0)21 808 3304
Cell:		+27 - (0)83 9479 042

email:	RKrug@sun.ac.za

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Received on Fri Sep 15 17:33:24 2006

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