st: sorting a variable list within each obs.(row)

["Murali Kuchibhotla" <muralik@iastate.edu>]

Hello,
      I have a dataset that looks like this:

Obs.  V1  V2  V3  V4
1     -1  -2  3   5
2     4    5  7   9

I would like to create a variable that picks out the minimum positive value 
from each row, i.e. one that picks out 3 from row 1 and 4 from row 2.How do I 
accomplish this? Thanks.


Murali


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