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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 |
Mon, 21 Sep 2009 18:59:50 -0400 |

it is wierd because it does not show anything when I put di A[1,2] though the following you gave still works perfectly. I just changed the main equation prob for etc... with my own equation and then mpg with varmain but I dont' understand why I dont get anything in the marg but just one zero. 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') levelsof mpg loc i 1 gen marg=0 foreach level in `r(levels)'{ mfx, var(mpg) at(mpg=`level') mat A = e(Xmfx_dydx) di A[1,2] replace marg=A[1,2] in `i' loc ++i } tw (connected probp1 probx), /* */ xti("Mpg") ytit("Probability") /* */ name(prob, replace) nodraw tw (connected marg probx), /* */ xti("Mpg") ytit("Marginal Effect") /* */ name(marginal, replace) nodraw gr combine prob marginal N On Mon, Sep 21, 2009 at 4:48 PM, Martin Weiss <martin.weiss1@gmx.de> wrote: > > <> > > -set trace on- just before you start cycling through the loop and watch for > anything unusual. You could also put > > > ************* > di A[1,2] > ************* > > inside the loop to see what it actually returns. > > HTH > Martin > > > -----Ursprüngliche Nachricht----- > Von: owner-statalist@hsphsun2.harvard.edu > [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Nirina F > Gesendet: Montag, 21. September 2009 22:44 > An: statalist@hsphsun2.harvard.edu > Betreff: Re: st: AW: why is this graph all over the place? > > No you are right, it is in [1,2]. > I put it back to [1,2]. > But I don't understand why I don't get the value of the marginal > effects. all I get is: > tab marg > > marg | Freq. Percent Cum. > ------------+----------------------------------- > 0 | 4,119 100.00 100.00 > ------------+----------------------------------- > Total | 4,119 100.00 > > > > > > * > * 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: why is this graph all over the place?***From:*Nirina F <fstata@gmail.com>

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

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

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

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

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