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From |
Prabhat <prabhat@iuj.ac.jp> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: plotting coefficients after quantile regression- beyond grqreg |

Date |
Tue, 9 Mar 2010 00:20:31 +0900 |

Sincere apologies. I was looking from totally wrong angle. As of now, script suggested by Martin is enough for the task. Thanks again. Regards, Prabhat Barnwal On Mon, Mar 8, 2010 at 9:58 PM, Prabhat <prabhat.barnwal@gmail.com> wrote: > Dear STATAlist and Martin, > > I think my prob requires separate scripting inside the loop. None of the > options seem to be helpful here. I am trying for last few hours but stil= l > clueless :(. > > Any help will be appreciated. > > Thanks. > > Regards, > Prabhat > > > > > On Mon, Mar 8, 2010 at 8:30 PM, Prabhat <prabhat@iuj.ac.jp> wrote: > >> Thank you very much Martin. >> It is very useful. However, I still need one more help. The average I wa= nt >> to use in the equation to predict the dependent variable (i.e. pred 10, >> pred20...etc in this script), should be for those observations belonging= to >> those quantile only. >> >> I mean, in the place of 'lengthmean', 'lengthmean 10', "lengthmean >> 20"...etc are required for the corresponding quantile of dependent varia= ble >> i.e. price here. >> >> I tried to move egen inside the for loop, but I failed to figure out the >> right way. >> >> Could you suggest a way out? >> >> Thanks again. >> >> Regards, >> Prabhat >> International University of Japan >> >> >> >> On Mon, Mar 8, 2010 at 3:10 AM, Martin Weiss <martin.weiss1@gmx.de>wrote= : >> >>> >>> <> >>> >>> The difficulty here is that -qreg- does not seem to like -fvvarlist-s, >>> which >>> in other cases make quadratic vars much easier to specify (It does not >>> allow >>> -coeflegend-, either...). So you want to check this very, very carefull= y >>> whether it does what you want: >>> >>> ******* >>> sysuse auto, clear >>> gen mpgsq=3Dmpg^2 >>> egen lengthmean=3Dmean(length) >>> egen turnmean=3Dmean(turn) >>> >>> foreach quant of numlist 10 25 50 75 90{ >>> qreg price mpg mpgsq length turn, q(`quant') >>> gen pred`quant'=3D_b[_cons]+_b[mpg]*mpg+_b[mpgsq]*mpgsq+ /* >>> */ _b[length]*lengthmean+_b[turn]*turnmean >>> la var pred`quant' "Quantile `quant'" >>> } >>> >>> sort mpg >>> >>> tw (line pred10 mpg) /* >>> */ (line pred25 mpg) (line pred50 mpg) /* >>> */ (line pred75 mpg) (line pred90 mpg) >>> ******* >>> >>> >>> HTH >>> Martin >>> >>> >>> -----Original Message----- >>> From: owner-statalist@hsphsun2.harvard.edu >>> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Prabhat >>> Sent: Sonntag, 7. M=E4rz 2010 15:04 >>> To: statalist@hsphsun2.harvard.edu >>> Subject: st: plotting coefficients after quantile regression- beyond >>> grqreg >>> >>> Dear all, >>> >>> I need your help regarding plots for quantile regression results. I am >>> new >>> to STATA as well as quantile regression both. >>> >>> I am running a quantile regression with independent variable X and its >>> square term i.e. X^2. there are a number of other variables. however, m= y >>> requirement is to show the parabolic curve i.e. dependent variable vs X >>> for >>> quantile=3D 0.1,0.25, 0.5, 0.75, 0.9, keeping all other explanatory >>> variables >>> at their average value. So, it will be kind of a 5 parabolic curves on = a >>> single plot. >>> >>> I know there is a very helpful command GRQREG, but it does not plot the >>> particular estimated coefficients for a number of quantiles on the same >>> plot. Kindly correct me, if there is any way here. >>> >>> Further, the only other option I can think of if to do it manually afte= r >>> getting the results. But, that seems to be a difficult and tedious tas= k >>> because i have to repeat it for a number of cycles. >>> >>> Any suggestion will be highly appreciated. >>> >>> Thank you. >>> >>> Regards. >>> Prabhat Barnwal >>> International University of Japan >>> >>> * >>> * 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/

**References**:**st: plotting coefficients after quantile regression- beyond grqreg***From:*Prabhat <prabhat@iuj.ac.jp>

**Re: st: RE: plotting coefficients after quantile regression- beyond grqreg***From:*Prabhat <prabhat@iuj.ac.jp>

**Re: st: RE: plotting coefficients after quantile regression- beyond grqreg***From:*Prabhat <prabhat.barnwal@gmail.com>

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