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From |
Nirina F <fstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: AW: why is this graph all over the place? |

Date |
Thu, 17 Sep 2009 11:54:43 -0400 |

Thank you very much Martin for your help. It worked so well. I have a few questions: is it possible also to graph the marginal effects of just the mpg at each value of mpg. I know if you calculate . mfx after . prob for price mpg rep78 headroom trunk weight then you get the marg. effects at the mean value but I would like the marginal effects at each value of mpg but keeping the other variables at their mean. I am aware of the -at- option but it's just difficult to graph it. Also, How would I change the name of the xaxis and yaxis of the previous graph? Thank you very much, Nrina On Thu, Sep 17, 2009 at 8:00 AM, Martin Weiss <martin.weiss1@gmx.de> wrote: > > <> > > For these purposes, Scott Long`s -findit spost- comes in handy. Of course, > Long and Freese (2006), http://www.stata-press.com/books/regmodcdvs.html, is > the canonical reference for what you are trying to achieve. Try this: > > > ************* > sysuse auto, clear > prob for price mpg rep78 /* > */ headroom trunk weight > > ins mpg > loc uniq= r(N_unique) > > su mpg, mean > prgen mpg, from(`r(min)') /* > */ to(`r(max)') /* > */ gen(prob) n(`uniq') > > tw (connected probp1 probx) > ************* > > > > HTH > Martin > > > -----Ursprüngliche Nachricht----- > Von: owner-statalist@hsphsun2.harvard.edu > [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Nirina F > Gesendet: Donnerstag, 17. September 2009 13:41 > An: statalist@hsphsun2.harvard.edu > Betreff: st: why is this graph all over the place? > > Dear all, > > I would like to graph the predicted probabilities of having foreign > against mpg in order to highlight the slope(basically the marginal > effects) at each value of mpg. > I run the following but it is all over the place because I think it is > giving me the predicted probabilities from different variables. > Could you help me in this please. also if you could help me graph the > marginal effects of mpg from this probit equation against each value > of mpg. > > probit foreign price mpg rep78 headroom trunk weight > predict pmpg, p > sort mpg > twoway line pmpg mpg > > Thank you veyr much, > N > * > * 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/ > * * 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**:**AW: st: AW: why is this graph all over the place?***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**References**:**st: why is this graph all over the place?***From:*Nirina F <fstata@gmail.com>

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