st: Data management

["Roy,Suryadipta" <suryadipta.roy@lawrence.edu>]

Hi,

I have a panel data of (say) 100 countries for 10 years. I 
am trying to attach identification numbers for these 
countries based on another dataset for merging purposes 
later on. So, I started with

a. egen id= group(code), where "code" is the code numbers 
of these countries, e.g. ABW, AFG etc.

b. Then I am trying to replace these id-s with
replace id=3 if id==1;
replace id=5 if id==2;
replace id=8 if id==3;

But the 3rd line of the command is replacing the first set 
of id-s also. I would greatly appreciate if someone can 
suggest how to take care of this.

Thanks,
Suryadipta.
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/