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From |
"Sandy Y. Zhu" <sandy.zhu@yale.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Append new row to existing matrix |

Date |
Sat, 24 Mar 2012 19:31:42 -0400 |

I guess I just want to know what I should do with this portion of the code if my variables are y (dependent), X1, X2, and X3 (independent) gen y=uniform() forv i=1(1)100 { qui gen x`i'=uniform() qui reg y x`i' Thanks! On Sat, Mar 24, 2012 at 7:28 PM, Sandy Y. Zhu <sandy.zhu@yale.edu> wrote: > Thank you! > > Would some one mind telling me what this portion of the code means? > >> qui gen x`i'=uniform() >> qui reg y x`i' > > I'm trying to run a multivariate regression, so should I do multiple > qui gen x`i'? > > Thanks! > > 2012/3/24 Jorge Eduardo Pérez Pérez <perez.jorge@ur.edu.co>: >> clear >> set obs 100 >> gen y=uniform() >> forv i=1(1)100 { >> qui gen x`i'=uniform() >> qui reg y x`i' >> matrix b=e(b) >> if `i'==1 matrix betas=b >> else matrix betas=(betas \ b) >> drop x`i' >> } >> matrix list betas >> >> Also, take a look at -statsby- >> _______________________ >> Jorge Eduardo Pérez Pérez >> >> >> >> On Sat, Mar 24, 2012 at 7:11 PM, Sandy Y. Zhu <sandy.zhu@yale.edu> wrote: >>> Hi guys: >>> >>> How can I append a new row to an existing matrix? Basically, I'm >>> trying to update the matrix in a loop, >>> >>> I have: >>> >>> for i=1 to 900 >>> {reg y x1 x2 x3 >>> mat beta=e(b) >>> >>> append e(b) to an existing matrix} >>> >>> Basically, I have 900 regressions to run, and I need to save the >>> beta values from each regression. I would like to save them all in a >>> matrix, so the first row in the matrix saves the betas from the 1st >>> regression, the 2nd row would save the coefficients from the 2nd >>> regression, etc.... >>> >>> >>> Thank you! >>> >>> -- >>> Yours sincerely, >>> >>> Sandy Y. Zhu >>> * >>> * 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/ > > > > -- > Yours sincerely, > > Sandy Y. Zhu -- Yours sincerely, Sandy Y. Zhu * * 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**:**Re: st: Append new row to existing matrix***From:*"Sandy Y. Zhu" <sandy.zhu@yale.edu>

**References**:**Re: st: Append new row to existing matrix***From:*Jorge Eduardo Pérez Pérez <perez.jorge@ur.edu.co>

**Re: st: Append new row to existing matrix***From:*"Sandy Y. Zhu" <sandy.zhu@yale.edu>

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