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

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

Subject |
st: RE: RE: Re: graph with 2 x axes |

Date |
Mon, 6 Sep 2004 14:06:00 +0100 |

In fact, you don't need any of this new class stuff. -histogram- is already prepared to think that it has a second x axis. Here is another take, this time using -mylabels- from SSC to get the label positions: . sysuse auto . su mpg Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- mpg | 74 21.2973 5.785503 12 41 . mylabels -1/3, myscale(21.2973 + (@) * 5.788503) local(LABELS) 15.5088 "-1" 21.2973 "0" 27.0858 "1" 32.8743 "2" 38.6628 "3" . histogram mpg, xaxis(1 2) xla(`LABELS', axis(2)) xtitle(z scale, axis(2)) (bin=8, start=12, width=3.625) Here I knew from the earlier graph that a sensible range was -1 to 3 on the z scale. Nick n.j.cox@durham.ac.uk Nick Cox > In the same spirit, and standing on Vince's shoulders (*), > > ------------------------------- myhistogram.do > qui su `0' > local imin = ceil((r(min) - r(mean))/r(sd)) > local imax = floor((r(max) - r(mean))/r(sd)) > forval i = `imin'/`imax' { > local labels `"`labels' `= r(mean) + (`i') * r(sd)' "`i'" "' > } > set graphics off > histogram `0', t1(z scale) > .Graph.insert (.xaxis2 = .axis.new , position(above)) above > plotregion1 > .Graph.set_axis_plotregion xaxis2 plotregion1 x > .Graph.xaxis2.major.add_ticks `labels' > set graphics on > graph display > ----------------------------------- > > This should work as follows: > > do myhistogram systolic > do myhistogram systolic if female > > etc. > > Nick > n.j.cox@durham.ac.uk > > (*) A book on catastrophe theory bore a dedication to a > beloved mentor: > "at whose feet we sit, on whose shoulders we stand". Only > topologists could > visualise the resulting position. > > Christopher F Baum > > > Please see Vince Wiggins' talk from the London meetings, where he > > presented code to do something like that in the example using US > > states. > > > > http://ideas.repec.org/s/boc/usug04.html > > > > Richard T. Campbell > > > > For teaching purposes,I would like to display a histogram with > > > overlaid normal density. I would like to display two x > axes on this > > > graph, one in the scale of the original variable, say > systolic blood > > > pressure and the other in the Z transform of that variable I can't > > > seem to figure out how to do that. Can someone help? > * * 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/

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