
Dear R users,

I have a simple question (probably) but i couldnt how to find a solution for that.

i am using 2 digit industry codes and 3 digit industry codes for my model, and i need to create dummies for the industries. The case is simple for the 2-digit industries since there are not that mcuh of them, so i am creating my dummies as following
ind_2da<-(ind_2d==11)#for the 11th industry
ind_2dc<-(ind_2d==12)#for the 12th industry and so on so forth ... then i directly put the dummy into the regression which works well.

but creating dummies for the 3-digit is rather complicated since there are alot of sub-industries, for example:111,112,113...119 and this is just for the 11th industry 
so when i consider the codes continues till 40, it would be exhausting to do it by hand.

so i was looking for the loop commands to do it faster but since i am a newbie i got lost in it.

so is there some one who can help me for this problem?

thanks in advance
 		 	   		  
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