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From |
"Pablo.CARVALLO" <pablocepal@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: How to identify two consequtives values of a variable |

Date |
Fri, 22 Jul 2011 13:06:21 -0400 |

Hi Statalist, I create a variable x which states a local max (1), a local min(-1), and 0 in other case. If x==1, the following value may be 0 or -1, but it cannot be 1 again. For example, an 'ideal' x may be: x -- 0 0 1 0 0 0 0 -1 0 0 1 -1 0 0 0 1 But I have something like this: x -- 0 0 1 0 0 0 0 1 ----> this value is wrong, because previous x different from 0 was 1. 0 0 -1 1 0 0 0 -1 I need a variable 'y' which tells me when x takes this wrong values: x y --------- 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 ---> y==1 0 0 0 0 -1 0 1 0 0 0 0 0 0 0 -1 0 Thanks a lot! Pablo Carvallo * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: How to identify two consequtives values of a variable***From:*Nick Cox <njcoxstata@gmail.com>

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