Hello, 
thank you very much for your help in last email. it is very helpful. right now, i have more questions about my project,
 
1. solve can i remove the NA from a vectors:
for exmample, if my vector is:
v <- (NA, 1, 2, 3, 4, 5)
how can I remove the NA from vector v
 
2. how I can get input from the user?
 
3. can I read more than one data files in one program? and how i can write something to a file
 
4. how i can display/output something on the screen?
 
thank you so much
 
Best wish
 
C-Ming
 
Jan 24, 2005
 
 

		
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