How to write Stata Command corre

[Yantuan Yu]

Dear Stataliters,
I'd want to obtain a weight vector by writing a stata command to realize its compute process. I have carried out these by a Stata .do profile, but I want to convert it to a Stata command. To run these code, we should read dataset first, but I think it doesn't be a barrier to convert it. The Stata code are listed as follows:

mata
w=st_data(.,.)
cols(w)
w=st_data(.,3..32)
cols(w)
ei=st_data(.,33)
rows(ei)
T=14
N=30
w1=J(1,1,.)
for (i=1;i<=T;i++) {
t1=(i-1)*N+1;
t2=i*N;
w2=st_data(t1::t2,3..32)*st_data(t1::t2,33);
w1=(w1\ w2);
}
J=J(421,1,1)
I=I(421,1)
w1=select(w1,J-I)
w1
end

I would feel very appriciate that anyone who can help me to fix this problem. Thx.
Best wishes!

[wbuchanan]

Consider installing dataex from ssc

ssc inst dataex

And providing example data to more explicitly show what you are hoping to accomplish. One thing that will likely cause issues turning this into a command is that all of the references to variables are hardcoded instead of being parameterized.

[Yantuan Yu]

OK, I will try in this way. wbuchanan, thanks for your help.