Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
From | Alex Olssen <alex.olssen@gmail.com> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: Mata and do files |
Date | Thu, 11 Aug 2011 09:14:04 +1200 |
Dear Nick, You are absolutely correct - it was Statalist. I am not sure what you mean by "try tokens("price length weight")." I looked at the help file and then tried the following, which again works interactively but not from a do file... sysuse auto, clear mata real scalar theta() { st_view(a = ., ., tokens("price length weight")) a_cov = variance(a) a_eigen = symeigensystem(a_cov, X = ., L = .) return(L[1]/sum(L)) } theta() Any ideas? On 10 August 2011 23:54, Nick Cox <njcoxstata@gmail.com> wrote: > It's not Stata that bounces your emails; it's Statalist! > > Try > > tokens("price length weight") > > Nick > > On Wed, Aug 10, 2011 at 12:39 PM, Alex Olssen <alex.olssen@gmail.com> wrote: >> Hi everyone, >> >> Apologies to anybody who gets this message twice - I just got an email >> from Stata telling me my first message was bounced. I checked the >> archive and it doesn't appear to have arrived correctly. In any >> case... >> >> I am trying to learn some Mata and am having difficult running Mata >> code from a do file. >> >> For example I can use the following code interactively, but if I try >> run it from the do-file editor I get error r(3000). I have looked >> around for an answer in [M] and the Statalist archives to no avail. >> >> sysuse auto, clear >> mata >> real scalar theta() >> { >> st_view(a = ., ., "price length weight") >> a_cov = variance(a) >> a_eigen = symeigensystem(a_cov, X = ., L = .) >> return(L[1]/sum(L)) >> } >> theta() >> >> Any help would be greatly appreciated. > > * > * 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/