Calling R from R and specifying "wait until script is finished"

Hello,

Let's say I have 50 R scripts to run.  What would be the most efficient way
to run them?

I thought I could do multiple Rterms in a DOS batch file:

Ex:
Rterm <1.R> 1.txt 
Rterm <2.R> 2.txt 
...
Rterm <50.R> 50.txt 

However, I'm afraid they will all open at the same time.   

pause the batch file with something like: 

PING 1.1.1.1 -n 1 -w 60000 >NUL  (to delay 60 seconds)

But that would require that I know how long each of my scripts take.

Is there an easier way?  Something like calling R from R and specifying that
the script has to be finished before continuing.

Thanks

Pierre Lapointe



*********************************************************************************** 
AVIS DE NON-RESPONSABILITE:\ Ce document transmis par courri...{{dropped}}