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From |
Ulrich Kohler <kohler@wz-berlin.de> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Combined Horizontal Box Blots do not line up |

Date |
Fri, 16 Sep 2005 15:31:14 +0200 |

The following code is a step in the door, but I wonder whether this is worthwile. If the categorical variables differ in their number of categories (i.e. levels), the -graph, by()- will lead either to unequal box-width or to unequal filled plotregions. I think it would be better to have the panels for each categorical covariate with a size proportional to the number of categories. With -graph combine- we might apply -fysize()- to correct for this but I cannot see how to automate this. ------------------------------------ program define hboxcomp version 9 syntax varlist, between(varlist) preserve // Generate Covariates for each dimension local i 1 local j 1 foreach var of local between { gen cov`j':cov = . local dimlab `"`dimlab' `j' `"`: var lab `var''"'"' levels `var', local(K) foreach k of local K { replace cov`j' = `i' if `var' == `k' label define cov `i++' `"`: label (`var') `k''"', modify } local j = `j' + 1 } // Reshape to long gen index = _n keep `varlist' cov* index reshape long cov, i(index) j(dim) label define dim `dimlab' label val dim dim // Graph graph box `varlist', over(cov) by(dim, cols(1)) nofill horizontal end n j cox wrote: > That works nicely. A refinement is to add > > label def dim 1 "Repair record" 2 "Origin" > label val dim > > before the -graph box- call to avoid the > detail of "1" and "2". > > One question now is there is a useful and interesting > generalisation that lends itself to automation? That > is, assume > > 1. There is a response variable. > > 2. There are two or more categorical covariates. > > 3. For each covariate, we want the distribution > of the response by its categories. > > 4. We want the individual displays aligned. > > Uses could vary from exploration all the way > to final report. > > Nick > n.j.cox@durham.ac.uk > > >>> Ulrich Kohler > > Thanks Vince, this answered my question thouroughly. I went for the > -reshape- solution, which is far as complicated as I thought. > > To round this tread up, here is a template for the auto-data: > > . gen cov1:cov = rep78 > . gen cov2:cov = 6 + foreign > . label define cov 6 "Domestic" 7 "Foreign" > . reshape long cov, i(make) j(dim) > . graph box turn, over(cov) by(dim, cols(1)) nofill horizontal > > Reshape rules! > > * > * 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/ -- kohler@wz-berlin.de +49 (030) 25491-361 * * 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: Re: st: Combined Horizontal Box Blots do not line up***From:*n j cox <n.j.cox@durham.ac.uk>

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