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Posted: **Fri Mar 11, 2016 6:41 am**

Hey there,

I have a bunch of dummy variables, say d_1_a, d_1_b,...,d_2_a, d_2_b etc. I would like to group them with something like:

Code: Select all


smpl @all
	for %j 1 2 3 4
	for %k a b c d 
		smpl @all
		string q = %j
		string r = %k
		group group_d_1_b "d_"+q+"_"+r
	next
	next

It doesnt really work, as the values of the group dummy variable are strings. I believe I mixed something up regarding the reference to the elements I want to group.

Posted: **Fri Mar 11, 2016 7:04 am**

Can't really see what you're trying to do.

Posted: **Mon Mar 14, 2016 3:26 am**

I have several dummy variables which are named according to the following structure:

d_1_a
d_2_a
d_1_b
d_2_b

etc.

I would like to create a variable (e.g. group_dummy) that groups all but one of the dummy variables. The idea is that I don't want to include all dummy variables (i.e. not the group) in a regression equation.

Does that make more sense?

Posted: **Mon Mar 14, 2016 6:44 am**

Code: Select all

group mygroup d_*
mygroup.drop d_2_b
equation eq01.ls y c d_2_b

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Group dummy variables

Group dummy variables

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Re: Group dummy variables

Re: Group dummy variables