On Aug 25, 2004, at 2:33 AM, Amadou wrote:
I have an income variable grouped into 5 categories (Q1 Q2 Q3 Q4 Q5)
ie from
poorest to
richest and I want to compute its covariance with the following vector:
| 0.1 |
| 0.3 |
| 0.5 |
X = | 0.7 |
| 0.9 |
. input q tgt
q tgt
1. 0.05 0.1
2. 0.21 0.3
3. 0.37 0.5
4. 0.56 0.7
5. 0.78 0.9
6. end
. corr q tgt,cov
(obs=5)
| q tgt
-------------+------------------
q | .08233
tgt | .0905 .1
. return lis
scalars:
r(N) = 5
r(cov_12) = .0904999940395357
r(Var_2) = .0999999925494196
r(Var_1) = .0823299950939419
Kit
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