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From |
ofran almossawi <ofran.almossawi@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: twoway bar |

Date |
Wed, 28 Mar 2012 14:23:56 +0100 |

very many thanks to you i shall try it today. On 28 March 2012 13:58, Nick Cox <njcoxstata@gmail.com> wrote: > In the case of the code below > > graph bar (mean) trunk turn, over(foreign) > > is a more direct approach. But you still need -twoway- to plot your > means and confidence intervals. > > Also, if in your code -group- is the x variable, then -by(group)- is > usually better omitted. > > Nick > > On Wed, Mar 28, 2012 at 1:49 PM, Nick Cox <njcoxstata@gmail.com> wrote: >> In each of your graph calls, you specify that -group- defines the x >> axis variable; inevitably -twoway- does exactly what you ask for and >> plots bars etc. on top of each other. >> >> You may be expecting default behaviour like that of -graph bar-, but >> -twoway bar- does not behave in the same way, >> >> One way round this is to use an offset. The following gives an example >> >> sysuse auto, clear >> egen mean_turn = mean(turn), by(foreign) >> egen mean_trunk = mean(trunk), by(foreign) >> label var mean_turn "Mean of Turn circle, ft" >> label var mean_trunk "Mean of Trunk space, cu. ft" >> gen foreign1 = foreign - 0.1 >> gen foreign2 = foreign + 0.1 >> twoway bar mean_turn foreign1 , barw(0.18) /// >> || bar mean_trunk foreign2, barw(0.18) xtitle("`: var label foreign'") >> base(0) xla(0 "Domestic" 1 "Foreign") >> >> See also >> >> SJ-7-1 gr0026 . . . . Stata tip 42: The overlay problem: Offset for clarity >> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J. Cui >> Q1/07 SJ 7(1):141--142 (no commands) >> tip for graphing several quantities on a continuous axis >> >> which is accessible to all at >> >> http://www.stata-journal.com/sjpdf.html?articlenum=gr0026 >> >> Nick >> >> On Wed, Mar 28, 2012 at 1:29 PM, ofran almossawi >> <ofran.almossawi@gmail.com> wrote: >> >>> I have done a two way bar plot but stata keeps stacking the bars and the sd >>> lines on top of each other instead of laying all four columns side by side. >>> >>> I have compared the pain scores of two groups of patients post caesarean >>> section, before and after taking their pain medications. The sm group take >>> their own pain killers, and the nsm group are given the painkillers by the >>> midwves. >>> >>> This is the code that I used: >>> >>> twoway (bar meanpain group) (rcap upper_pain lower_pain group) (bar >>> meanmed group) (rcap upper_med lower_med group), by(group) >>> >>> i'm not sure where i'm going wrong with this. >>> > > * > * 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/

**References**:**st: twoway bar***From:*ofran almossawi <ofran.almossawi@gmail.com>

**Re: st: twoway bar***From:*Nick Cox <njcoxstata@gmail.com>

**Re: st: twoway bar***From:*Nick Cox <njcoxstata@gmail.com>

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