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From |
Partho Sarkar <partho.ss+lists@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: flagging significant values in a variable |

Date |
Sat, 3 Mar 2012 20:50:47 +0530 |

True, I had overlooked the earlier solutions- because the question appears on 2 separate threads . I answered the one w/o any answers at the time, w/o having seen the other thread. ( Btw this raises some issues about duplicate threads, possibly unintendedly so, which often confuse! ) The code was just a sketch of an idea- I assumed (mistakenly perhaps) that the user would realize the need to qualify the if loops in practice (start off the loops with a foreach statement to loop through all the observations) . The tolerance given is also only an example! All this based on what I think is a legitimate interpretation of the original question! Partho On Sat, Mar 3, 2012 at 8:22 PM, Nick Cox <njcoxstata@gmail.com> wrote: > This post overlooks earlier solutions posted yesterday. I see no need > to complicate anything by introduction of a tolerance, which seems > based on an idea that the rates are exact decimals to 4 d.p. > > Also, the code won't work as intended because it confuses the -if- > command and the -if- qualifier. > > FAQ . . . . . . . . . . . . . . . . . . . . . if command vs. if qualifier > . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J. Wernow > 6/00 I have an if command in my program that only seems > to evaluate the first observation, what's going on? > http://www.stata.com/support/faqs/lang/ifqualifier.html > > Nick > > On Sat, Mar 3, 2012 at 2:10 PM, Partho Sarkar <partho.ss+lists@gmail.com> wrote: >> Tim, >> >> I am afraid you haven't spelt it out very clearly! Based on one >> possible interpretation, this would be one way to do it (shown only >> for the LCI (renamed lci) variable): >> >> ---------------------------START CODE------------------------------------------- >> >> egen natlci=total(lci*(region==99)) // generates a value for each >> obs., equal to national value) >> local tol .0001 // define tolerance for "significantly lower or higher" >> gen byte tag= . >> if lci-natlci>`tol' { >> replace tag=1 >> } >> else if lci-natlci< -`tol' { >> replace tag= 2 >> } >> else { >> replace tag = 0 >> } >> >> ---------------------------END CODE------------------------------------------- >> >> Hope this helps >> >> Partho >> >> From Tim Evans <Tim.Evans@wmciu.nhs.uk> >> To "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu> >> Subject st: flagging significant values in a variable >> Date Fri, 2 Mar 2012 09:24:46 +0000 >> >> Hi, >> >> I have a dataset that has variables of rates, LCI and UCI for a >> number of regions in addition to a national average (rate, LCI, UCI) >> so that it looks like this: >> >> rate LCI UCI region >> 0.9727 0.9583 0.9849 1 >> 0.9713 0.9523 0.9867 2 >> 0.9835 0.9667 0.9971 3 >> 0.9790 0.9741 0.9836 99 >> >> What I would like to do is generate a flag beside each row that >> will flag up entries where they are significantly higher (1) or lower >> (2) or not significantly different (0) to region 99 - I'm unsure as to >> the code here and would appreciate any advice. I'm using Stata 11.2. > > * > * 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**:**Re: st: flagging significant values in a variable***From:*Nick Cox <njcoxstata@gmail.com>

**References**:**re:st: flagging significant values in a variable***From:*Partho Sarkar <partho.ss+lists@gmail.com>

**Re: st: flagging significant values in a variable***From:*Nick Cox <njcoxstata@gmail.com>

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