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From |
Jeph Herrin <junk@spandrel.net> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Extracting scalar from a vector |

Date |
Wed, 07 Oct 2009 12:19:59 -0400 |

If I understand correctly, -x- is a variable that is constant across each value of -state-. In that case foreach s in 6 8 17 21 { keep if state == `s' local start=x[1] forval i = `start' (1) 16 { .... } } should do it. hth, Jeph John Pfaff wrote:

Thanks to those who helped me with my question yesterday. One more quick question after that. I'm trying to extract a scalar value from a vector and use it in a forval loop. The code I have is this: foreach s in 6 8 17 21 { keep if state == `s'forval i = XXX (1) 16 {....}}It's the XXX that is the problem. I have a vector x that takes on different values for each state s, and I want the forval loop to run from that value to 16. In other words, x == 14 when s == 6, x == 10 when s == 8, and so on. But I have a lot of observations per state, so while x is constant for each state it is still a vector. How do I extract its scalar value to insert where the big XXX is in my code? This seems like it should be simple, but I've been thwarted for a while now. Thanks so much! All the best, John Pfaff * * 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/

* * 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/

**References**:**st: Extracting scalar from a vector***From:*"John Pfaff" <jpfaff@law.fordham.edu>

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