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From |
Nick Winter <nw53@cornell.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
RE: st: RE: survey completion "flag" |

Date |
Fri, 18 Feb 2005 11:48:03 -0500 |

Two problems, I think.

First, because whichislast is initialized as missing, max(whichislast, `i') will always return missing.

Second, if the variables numbers have leading zeros (e.g. Q001 rather than Q1), this code won't work.

Here's a version that also makes the resulting variable contain the whole variable name, not just the number:

gen str whichislast = ""

qui forval i = 1/170 {

local j : di %03.0f `i'

replace whichislast = "Q`j'" if Q`j'<.

}

At 09:57 AM 2/18/2005 +0000, you wrote:

--------------------------------------------------------gen whichislast = . qui forval i = 1/170 { replace whichislast = max(whichislast, `i') if Q`i' < . } Nick n.j.cox@durham.ac.uk Marilyn Matevia > Let me push my luck a little... If this is the right way to write > the code (to evaluate which of 170 questions is the last question > answered): > > egen LASTRSP = rlast(Q001-Q170) > > ... Is there a way to have it return the variable name (which is the > question number) instead of the value of the response? > > Have a look at -egen, rlast()-. > > > I am a very new user of Stata, so I apologize in advance if this > is > > > a dumb question. I'm still learning how Stata "thinks" > (compared to > > > SAS) and can't figure out how to tackle this: > > > > > > I have a data set of responses to a very long (170 questions) > survey > > > with many nested skip patterns, and about 2200 respondents. > After > > > working out the skip codes, I still have many "missing" > observations > > > for some items, and figure these are due to incomplete surveys. > I > > > want to create some kind of "completion flag" to see which > > > respondents make it to the end of the survey, and - if they > don't - > > > to see which question is the respondent's last (which is > complicated > > > by the skip patterns). > > > > > > I'm just not coming up with a sensible way to do this in Stata. > Can > > > someone point me in the right direction? * * 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/

Nicholas Winter 607.255.8819 t

Assistant Professor 607.255.4530 f

Department of Government nw53@cornell.edu e

308 White Hall falcon.arts.cornell.edu/nw53 w

Cornell University

Ithaca, NY 14853-4601

*

* 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: RE: survey completion "flag"***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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