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From | Laura Maria Schwirz <schwirzl@tcd.ie> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: RE thread: SEM with categorical variables |
Date | Wed, 13 Mar 2013 16:27:23 +0000 |
Apologies. So basically the code suggested by Stas works just fine but obviosuly, once I run the clear command, the data in memory is clear. So if I then ask to set the correlation matrix, it cannot find it. This works just fine. local thevars hewsonstrong hewsonknowo hewsonint hewsoninspi hewsonmoral hewsoncom hewsondecent hewsondepend hewsonrel hewsonsens polychoric `thevars' mat polychR = r(R) forvalues i=1/`: word count `thevars' ' { forvalues j=1/`i' { local setcor `setcor' `=polychR[`i',`j']' } if `i' < `: word count `thevars' ' local setcor `setcor' \ } local N = _N Problem arises here as memory is set clear and no data stored which is essentially needed when setting ssd. clear ssd init hewsonstrong hewsonknowo hewsonint hewsoninspi hewsonmoral hewsoncom hewsondecent hewsondepend hewsonrel hewsonsens ssd set obs 1456 --> ssd set cor `setcor': it cannot obviously find setcor as memory has been cleared to run ssd command. Hope this is clearer now. Thanks, Laura On 13 March 2013 16:02, JVerkuilen (Gmail) <jvverkuilen@gmail.com> wrote: > I'm afraid I have nothing specific to add but general troubleshooting > advice is: > > Cut down on the number of degrees of freedom in the problem you want > to solve. Try doing the analysis "by hand" as it were. So make the > polychoric matrix, save it, use SEM to analyze, etc. See that that > works. If it does, then the problem has to be somewhere in the .do > file itself. > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ > -- Laura Schwirz PhD Candidate and IRCHSS Scholar Department of Political Science Trinity College Dublin Dublin 2 Republic of Ireland Email: schwirzl@tcd.ie * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/