[R] R: Changing zeros to NAs in a data frame
    Vito Ricci 
    vito_ricci at yahoo.com
       
    Tue Nov 16 18:20:37 CET 2004
    
    
  
Hi,
see this example. I hope I helped you a little bit.
Bye
Vito
dati
   X  Y    Z
1 10  0  "0"
2  0 20 "60"
3 30 40 "50"
4 11 12   3"
> dati[dati==0]<-NA
> dati
   X  Y    Z
1 10 NA  "0"
2 NA 20 "60"
3 30 40 "50"
4 11 12   3"
=====
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