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st: Problems with:"drawnorm "$varlist"_1, mean(b1) cov(V1)


From   Daniele Pacifico <danielepacifico@yahoo.it>
To   statalist@hsphsun2.harvard.edu
Subject   st: Problems with:"drawnorm "$varlist"_1, mean(b1) cov(V1)
Date   Thu, 9 Sep 2010 14:52:37 +0000 (GMT)

Dear Statalist,

I have a problem with the following loop:

global varlist "x y z"
forvalues c=1/5{
drawnorm "$varlist"_`c', mean(b`c') cov(V`c') 
}

Where b`c' is a 1x5 vector and V`c' is a 5x5 matrix..

With the previous loop I would like to create these new set of variables: 
x_1, y_1, z_1 with mean b_1 and var-cov V_1;
x_2, y_2, z_2 with mean b_2 and var-cov V_2;
etc..


In other words, I would like to create 3x5 new variables using the same name 
of the tree main variables (x,y,z) but adding  _`c'  at the end of each of 
them... Of course, I can always write:

forvalues c=1/5{

drawnorm x_`c' y_`c' z_`c' , mean(b`c') cov(V`c') 
}
and get what I want.. However, I need to find a way that allows me to change 
automatically the number and the name of the variables in varlist..
Any advise about the right way of constructing this type of loop?

Thanks in advance,
Daniele Pacifico


      


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