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From |
"Keith Dear" <Keith.Dear@anu.edu.au> |

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

Subject |
st: RE: RE: nl @ within ado |

Date |
Tue, 26 Oct 2010 10:34:26 +1100 |

Nick, No problem at all -- except that it didn't work (that's what I meant by "Stata wasn't fooled": sorry for being cryptic). ======== mymodel.ado run nlmyfit.do // try defining the required program externally prog mymodel ... nl myfit @ y x, param(...) init(...) ... end ======== nlmyfit.do prog nlmyfit ... end ==================== But -prog list- STILL shows mymodel.nlmyfit, and there is still no program called just nlmyfit, which nl requires. However I have just tried (what I suppose should have been obvious) defining nlmyfit in nlmyfit.ado instead of in nlmyfit.do, and allowing Stata to find it when needed instead of loading it explicitly as above -- and that now works. It would be good if -help nl- could mention that when calling -nl- from a user-written ado file, the function evaluator program MUST be defined in a separate ado file, not within (or from within) the primary one. This is the situation (here "B" is playing the role of -nl-): ======== A.ado prog A di "A" C B end prog C di "C" end ======== B.ado prog B di "B" C end ============ . discard . A A C B unrecognized command: C r(199); We are told that when faced with the command A, Stata (not finding said command) executes A.ado then tries again. So why is program C not defined along with A? Answer: because it is silently renamed "A.C", and is not available except directly to A. "Stata does not find this confusing and neither should you." (U18.11.4). kd -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox Sent: Monday, 25 October 2010 11:16 PM To: 'statalist@hsphsun2.harvard.edu' Subject: st: RE: nl @ within ado Conversely, why it is a problem that a separate file is needed? For example, packages based on -ml- are distributed as sets of files. Nick n.j.cox@durham.ac.uk Keith Dear I am trying to build an ado file to fit a certain nonlinear model using the function evaluator version of nl. This requires defining a subsidiary program whose name must begin with 'nl'. So I wrote something like this: ======== mymodel.ado prog mymodel ... nl myfit @ y x, param(...) init(...) ... end prog nlmyfit ... end ==================== This doesn't work because, being a subprogram of mymodel, the program nlmyfit is actually named mymodel.nlmyfit, and so nl doesn't find it. If I move the definition of nlmyfit to the calling do-file then the whole thing works, but that defeats the purpose of writing an ado file at all. Is there a way to define a program within an ado file but NOT have it named as a subprogram? (I tried putting nlmyfit in a separate file and running it from within mymodel.ado, but Stata wasn't fooled.) Or any other solution? * * 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: RE: RE: RE: nl @ within ado***From:*Nick Cox <n.j.cox@durham.ac.uk>

**References**:**st: nl @ within ado***From:*"Keith Dear" <Keith.Dear@anu.edu.au>

**st: RE: nl @ within ado***From:*Nick Cox <n.j.cox@durham.ac.uk>

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