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From |
Keith Dear <keith.dear@anu.edu.au> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: let loop stop when the first variable x becomes 0 |

Date |
Fri, 20 Jun 2008 10:26:54 +1000 |

Mandy, You could do it like this: gen byte firstzero=. forval y=1995/2002 { replace firstzero=`y' if firstzero==. & x`y'==0 } Keith At 10:05 AM 20/06/2008, you wrote:

Dear Statalists, I have a data set like this: ------------------------------------------------------------------- ID,x1995, x1996, x1997, x1998, x1999, x2000, x2001, x2002 1 1 0 1 1 0 1 0 0 2 0 0 0 0 1 0 0 0 3 1 1 0 1 0 0 0 0 --------------------------------------------------------------------- I want to find out for each observation the first year when the value of the variable x becomes 0. For example, for observation 1, the first year x becomes 0 is 1996. For observation 2 and 3, 1995 and 1997 respectively. I'm not sure how to let the "searching the first 0" loop stop when x becomes 0. I checked STATA's help; I was wondering if the command "continue" will work here. Could someone give me some hints about this? Thanks a lot! Mandy Jia * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

Dr Keith B.G. Dear Senior Fellow in Biostatistics National Centre for Epidemiology and Population Health Australian National University Canberra, ACT 0200, Australia Tel: 02 612 54865, Fax: 02 612 50740 http://nceph.anu.edu.au/Staff_Students/staff_pages/dear.php CRICOS provider #00120C http://canberragliding.org/ * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: let loop stop when the first variable x becomes 0***From:*Keith Dear <keith.dear@anu.edu.au>

**References**:**st: let loop stop when the first variable x becomes 0***From:*Man Jia <jia.m@neu.edu>

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