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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

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

Subject |
st: RE: Re: eqany |

Date |
Mon, 8 Jul 2002 16:33:44 +0100 |

> Ronnie Babigumira wrote > > I am cleaning data (that's all I seem to be doing) and I am a little > puzzled here. A while ago, I asked on how to identify illegal entries when > a variable takes on values in batches (e.g. 11 to 19 21 to 25 etc). Nick > Cox pointed me to > > . egen OK = eqany(cropcod2), values(110/120 220/227 330/334 440/446) > . list houscode cropcod2 if !OK > > This has very well for, however, today I tried > > . egen OK = eqany(inpcode), values(500/505 599 601 1100/1111 /* > . */ 1200/1201 2100/2160/ 2200/2220 2299 2300/2302) > . list houscode inpcode if !OK > > I get an error message; > > . egen OK = eqany(inpcode), values(500/505 599 601 1100/1111 /* > > */ 1200/1201 2100/2160 2200/2220 2299 2300/2302) > varlist not allowed > r(101); > > Any one familiar with this and a way around it? > > >>> Tom Steichen identified a typo in what is above. However, > I suspect that this typo is just in what Ronnie sent to the list > and that there is something more fundamental here. > > My answer is just a variation on the answer to Daniel > Caro on 28 June. > > You are, I believe, tripping some limitation to the built-in > command -numlist-, which is called by -egen, eqany()-. If > I am right, this can be shown directly by pushing your numlist > at -numlist-. > > An alternative for this problem is the use of -merge- as a variation on a > trick documented by Kit Baum at > http://www.stata.com/support/faqs/data/characteristics.html > > Put the values you want to select as a single variable in one > Stata .dta file and then -merge- it with your main data file. > The observations you want are the intersection of the two, > for which _merge == 3. You can choose either one-to-one or match merging. > > Nick > n.j.cox@durham.ac.uk Well, it seems that the answer is more complicated yet. -egen, eqany()- stops when it passes the numlist of Ronnie's values to -numlist-. Use Ronnie's numlist directly with -numlist- and it is happy with that numlist supplied in abbreviated form. The explanation may lie in the fact that the -numlist- statement within -eqany()- is receiving the numlist in unabbreviated (expanded) form, by virtue of its prior expansion when it leaves -syntax-. There may be some redundant code there in -eqany()-, which can be blamed on the original programmer, I guess, but the deeper question is why -numlist- is choking on a numlist with fewer elements than its advertised limit. (See -limits-.) Nick n.j.cox@durham.ac.uk * * 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/

**Follow-Ups**:**Re: st: RE: Re: eqany***From:*Babigumira Ronnie <rutaremwa_rb@yahoo.com>

**References**:**st: Re: eqany***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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