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st: counting per index


From   "Ypma, Jelmer Yeb" <jelmer@rand.org>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: counting per index
Date   Mon, 15 Nov 2004 11:40:25 -0800

Hi all,

I guess there is a easy solution for this, but after looking at it for a couple of hours I and searching the internet for the solution I still haven't found it. Now my mind is completely lost somewhere, so I hope any of you can help me out.

I have a variable -limit- with limits. e.g.
2
1
0
2
2
3
And there is variable for instance called -x- with other values e.g.
0
1
2
5
-3
3
What I want is a new variable which has on index i the counts of -x-'s smaller than the -limit- on that index. So for index 1 I want to count the number of values which are smaller than limit[1] = 2. In this case values 0,1 and -3 of -x- are smaller, so I want to have 3 on index 1 in my new variable.
For index 2, only values 0 and -3 are smaller than limit[2]=1, so I want a 2 there.
I tried summing over a variable with ones which didn't seem to work...
(for instance: gen nsmall = sum(ones) if x < limit[_n])

Any other suggestions?

Thanks!

Jelmer

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