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

[Jeph Herrin <stata@spandrel.net>]

This might work for you

 global varlist "x_ y_ z_"
 forvalues c=1/5 {
	global newvarlist=subinstr("$varlist","_","_`c'",.)
        drawnorm $newvarlist, mean(b`c') cov(V`c')
 }

hth,
Jeph

On 9/9/2010 10:52 AM, Daniele Pacifico wrote:
> 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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