re: st: copying last reported value

[Christopher Baum <kit.baum@bc.edu>]

<>
. g var4 = .
(20 missing values generated)

. bys var2 (var1): replace var4 = cond(mi(var3), var4[_n-1], var3)
(17 real changes made)

. l

     +---------------------------+
     | var1   var2   var3   var4 |
     |---------------------------|
  1. |    1      1      .      . |
  2. |    2      1     .2     .2 |
  3. |    3      1      .     .2 |
  4. |    4      1      .     .2 |
  5. |    5      1      .     .2 |
     |---------------------------|
  6. |    6      1      .     .2 |
  7. |    7      1      .     .2 |
  8. |    8      1     .3     .3 |
  9. |    9      1      .     .3 |
 10. |   10      1      .     .3 |
     |---------------------------|
 11. |    1      2      .      . |
 12. |    2      2      .      . |
 13. |    3      2     .1     .1 |
 14. |    4      2      .     .1 |
 15. |    5      2      .     .1 |
     |---------------------------|
 16. |    6      2      .     .1 |
 17. |    7      2     .5     .5 |
 18. |    8      2      .     .5 |
 19. |    9      2      .     .5 |
 20. |   10      2      .     .5 |
     +---------------------------+

. 




Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
                              An Introduction to Stata Programming  |   http://www.stata-press.com/books/isp.html
   An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html


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