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From |
"Sergiy Radyakin" <serjradyakin@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Extracting from returned Matrix |

Date |
Tue, 19 Feb 2008 16:39:02 -0500 |

I am 100% sure that it is a classical problem of inaccessibility of elements of e() matrix. Together with quotes, macros and gettoken/parse this is the most common obstacle. Stata does not understand: matrix B=e(V)[2,3] Stata does understand: matrix A=e(V) matrix B=A[2,3] I.e. you need a temporary matrix. Think of e() as a function, and functions do not have indices, even if the results they return are matrices. Best regards, Sergiy Radyakin On 2/19/08, Austin Nichols <austinnichols@gmail.com> wrote: > Martin Weiss <martin.weiss@uni-tuebingen.de>: > You say you want to use -post- but you don't show your code, so I'm > not sure where the problem is: > > webuse fuel, clear > mean mpg*, vce(bootstrap) > mat ci=e(ci_normal) > postfile t row lb ub using /tmp, replace > post t (1) (ci[1,1]) (ci[1,2]) > post t (2) (ci[2,1]) (ci[2,2]) > postutil clear > use /tmp > li > > > On Feb 19, 2008 3:37 PM, Martin Weiss <martin.weiss@uni-tuebingen.de> wrote: > > Guys, > > > > I am so sick of this: trying to extract an e()-class result stored in a > > matrix. All I want is to show the development of the upper and lower bound > > of the ci for the mean in > > > > ______________________________________ > > webuse fuel > > mean mpg1 mpg2 > > > > mean mpg*, vce(bootstrap, reps(100)) > > > > mean mpg*, vce(bootstrap, reps(1000)) > > ______________________________________ > > > > > > I know the result is stored in "matrix list e(ci_normal)". Now how do I > > extract the upper and lower bound (to post them to a postfile and later plot > > the two in a tw (line ub lb) (line ub lb)-type of graph)? I can get the > > stuff into a matrix but where do I go from there? I have been reading the > > User`s guide up and down, but as far as I can tell, it dodges the > > question... > > > * > * For searches and help try: > * http://www.stata.com/support/faqs/res/findit.html > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**Re: st: Extracting from returned Matrix***From:*"Austin Nichols" <austinnichols@gmail.com>

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