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st: use random values in a calculation


From   Zhi Su <su.zh@husky.neu.edu>
To   statalist <statalist@hsphsun2.harvard.edu>
Subject   st: use random values in a calculation
Date   Fri, 1 Jul 2011 22:46:25 -0400

Dear Statalists,

  I need to generate a set of variables that are som of four variables
v1 v2 v3 v4 multipled by a ratio r1 r2 r3 r4 which are randomly chosen
from (0, 0.05,0.1,0.15,0.2). For example,
s0=v1*0+v2*0+v3*0+v4*0
s1=v1*0.05+v2*0+v3*0_v4*0
s2=v1*0.05+v2*0.05+v3*0+v4*0
.
.
.
s625=v1*0.2+v2*0.2+v3*0.2+v4*0.2

How can I use commands to generate these 625 variables?

Thank you!

-- 
Zhi Su
348 Holmes Hall
Northeastern University
360 Huntington Avenue
Boston, MA 02115
Office:1-617-373-2316
email:su.zh@husky.neu.edu
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