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From |
"Austin Nichols" <austinnichols@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: bihistogram |

Date |
Wed, 27 Aug 2008 13:02:27 -0400 |

All-- Probably the other sources of help or examples cited below are a poor substitute for help twoway bar##remarks3 combined with -egen- and -collapse- as necessary (though it is the -egen- and -collapse- step that no doubt is confusing to most users who want to create their own variant on a histogram), but I agree with other posters that the bihistogram or population pyramid often obscures rather than illuminates, and I tend to prefer overlaid kernel density plots to various alternatives (but there will be issues of bandwidth or bin selection in any solution, I think). One can even use -kdensity- or -tw kdensity- with already aggregated data, though it stands out in part because it does not require the data to be already binned and collapsed (and allows weights); using a rectangular kernel you can in fact produce a histogram. But compare the output to an "overlaid histogram" by pasting this into your Command window: sysuse pop2000, clear ren agegrp a ren maletotal m ren femtotal f loc c `"bw(.5) k(rec) yti("") xti("")"' loc c `"`c' yla(,angle(0)) ysc(r(0)) xla("' forv i=1/17 { loc c `"`c' `i' "`:label (a) `i''""' } loc o `", `c',labs(tiny)) leg(lab(1 "Male") lab(2 "Female"))"' tw kdensity a [aw=m]`o'||kdensity a [aw=f]`o' name(k, replace) g a1=a*3-1 g a2=a*3 cap labmask a1, val(agestr) if _rc!=0 { ssc inst labutil labmask a1, val(agestr) } loc o `"yti("") yla(,angle(0)) ysc(r(0)) xla(2(3)50,val labs(tiny))"' tw bar m a1 || bar f a2,`o' On Tue, Aug 26, 2008 at 5:30 PM, Sergiy Radyakin <serjradyakin@gmail.com> wrote: > Hi there! > > What is the difference between bihistogram and a population pyramid? > Is it another way of drawing (horizontal vs vertical)? Or is it just > another term? > > If so, this might be helpful: > http://www.ats.ucla.edu/stat/Stata/library/GraphExamples/code/twobar4.htm > > and this too: > net search pyramid <snip> >> On Tue, Aug 26, 2008 at 1:54 PM, Austin Nichols <austinnichols@gmail.com> wrote: >> > See also >> > http://www.stata.com/support/faqs/graphics/gph/graphdocs/twbar3.html >> > but I would fix the negative labels--no reason not to make them >> > positive in both directions. <snip> * * 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/

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

**Re: st: RE: bihistogram***From:*"Austin Nichols" <austinnichols@gmail.com>

**Re: st: RE: bihistogram***From:*"Austin Nichols" <austinnichols@gmail.com>

**Re: st: RE: bihistogram***From:*"Sergiy Radyakin" <serjradyakin@gmail.com>

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