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

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

Subject |
st: AW: Taking mata views of ereturn stats? |

Date |
Fri, 18 Dec 2009 16:38:22 +0100 |

<> To really get used to -mata-, try Kit`s http://www.stata.com/meeting/fnasug08/baum_StataMata.beamer.FNASUG08.pdf , and of course chapters 13 and 14 of his book http://www.stata-press.com/books/isp.html. In addition, the "Mata Matters" columns in the SJ, http://www.stata-journal.com/archives.html HTH Martin -----Ursprüngliche Nachricht----- Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Skipper Seabold Gesendet: Freitag, 18. Dezember 2009 16:28 An: statalist@hsphsun2.harvard.edu Betreff: st: Taking mata views of ereturn stats? Hello all, I am trying to get used to Stata's mata environment. I am somewhat familiar with Stata but as far as the matrix operations am more familiar with environments like R, Matlab, or Python, and am having some trouble using Stata in the same way, though I understand that mata is C-like. For instance, say I want to do something like have a vector of the standard errors that I can access element-wise. Is there a quick way to go between stata and mata to do this. Given the following example, webuse sysdsn1 mlogit insure age male nonwhite i.site Is there a quick way to get e(V) into a matrix so that I can do element-wise operations like taking the square root of the diagonal? I was thinking that I could just assign e(V) to a matrix, then take a view on this in mata, but this doesn't seem to be the way that Stata works. Alternatively, I think I could save e(V) to a datset and load it so that V is the dataset and use st_data or st_view, or I could just program the whole estimator in mata, but this all seems like overkill for something that's seems so natural in other environments. Any help or pointers to other resources would be appreciated. Cheers, Skipper * * 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**:**st: xtlogit, clogit, fixed effects?***From:*"Anderson, Bradley" <BJAnderson@Butler.org>

**References**:**st: Taking mata views of ereturn stats?***From:*Skipper Seabold <jsseabold@gmail.com>

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