Dear statalisters,
I have a variable in which observations take one out of 9 values:
11,12,13,21,22,23,24,31,32,33
So, observations assume the values 1`i', 1`i', 3`i', for i = 1,2 or 3.
Assuming that I have 1000 observations , I would like to:
(1) randomly sample, say, 25 observations satisfying the condition ==1`i'
(2) randomly sample 50 observations satisfying the condition ==2`i'
(3) randomly samply another 25 observations satisfying the condition ==3`i'
Then, I would like to count the frequency of each `i' in the first, second
and last samplings.
For example, considering yet the example above, assume that among the
first sampling (25 obs), 12 observations were 1`3', 10 were 1`1' and 3
were 1`2' (12+10+3 = 25 sampled observations).
I would like to obtain the following result:
`1' = 10
`2' = 03
`3' = 12
Is it possible to perfom such sampling scheme using Stata?
Thank you very much.
Tiago
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
