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From |
"Martin Weiss" <martin.weiss1@gmx.de> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: AW: re: logistic function |

Date |
Thu, 18 Jun 2009 19:26:46 +0200 |

<> " In my prior example I had the line gen d = (runiform()>0.7)" Which is very necessary as otherwise "d" will not be a dummy, as John thought, but "displacement" if -varabbrev- is off... HTH Martin -----Ursprüngliche Nachricht----- Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Kit Baum Gesendet: Donnerstag, 18. Juni 2009 19:24 An: statalist@hsphsun2.harvard.edu Betreff: st: re: logistic function <> Nick pointed out invlogit(), which does not appear in the function list of density functions, but of math functions. Quite so, but it doesn't save much typing: local cum1 1/(1+exp(-((_b[_cons]+ _b[trunk]*mut + _b[mpg]*mum + _b[d]*1) - mu)/s)) scalar onea = invlogit((_b[_cons]+ _b[trunk]*mut + _b[mpg]*mum + _b[d]*1 - mu)/s) will indeed generate the same values, but you still have to compute mu and s and include them in the function argument. In my prior example I had the line gen d = (runiform()>0.7) which did not appear in the posting. 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 * * 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: re: logistic function***From:*Kit Baum <baum@bc.edu>

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