boxlook optionsDescription noout sidesdonotplotoutsidevaluesboxbarlook optionslookofthboxpcyc leboxstylesbeforepstylesrecycleinten sityintensityoflllinten sityintensityofoutlineme ID: 241519
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2graphbox—Boxplots boxlook optionsDescription noout sidesdonotplotoutsidevaluesbox(#,barlook options)lookof#thboxpcyc le(#)boxstylesbeforepstylesrecycleinten sity(*#)intensityoflllinten sity(*#)intensityofoutlinemedt ype(linejclinejmarker)howmedianisindicatedinboxmedl ine(line options)lookoflineifmedtype(cline)medm arker(marker options)lookofmarkerifmedtype(marker)cwhi skersusecustomwhiskersline s(line options)lookofcustomwhiskersal size(#)widthofadjacentline;defaultis67cap size(#)heightofcaponadjacentline;defaultis0m arker(#,marker optionslookof#thmarkerandlabelforoutsidevaluesmarker label options)outergap(*#)gapbetweenedgeandrstboxandbetweenlastboxandedgeboxgap(#)gapbetweenboxes;defaultis33 See[G-3]barlook options,[G-3]line options,[G-3]marker options,and[G-3]marker label options.legending optionsDescription legend optionscontrolofyvarlegendnolab eluseyvarnames,notlabels,inlegendyvar options(over subopts)over suboptsforyvars;seldomspeciedshowyvarslabelyvarsonxaxis;seldomspecied See[G-3]legend options.axis optionsDescription yalt ernateputnumericalyaxisonright(top)xalt ernateputcategoricalxaxisontop(right)yrev ersereverseyaxisaxis scale optionsy-axisscalingandlookaxis label optionsy-axislabelingytitle(:::)y-axistitling See[G-3]axis scale options,[G-3]axis label options,and[G-3]axis title options. 4graphbox—Boxplots Theencodingandthewordsusedtodescribetheencodingareooutsidevaluesoadjacentline upperadjacentvalue whiskers 75thpercentile(upperhinge) box median 25thpercentile(lowerhinge)whiskers adjacentline loweradjacentvalueooutsidevaluegraphhboxdrawshorizontalboxplots.Inahorizontalboxplot,thenumericalaxisisstillcalledtheyaxis,andthecategoricalaxisisstillcalledthexaxis,butyispresentedhorizontally,andxvertically..graphhboxy1y2,over(cat_var)x | ofirst group | sameconceptuallayout asforgraphbox: y1,y2appearonyaxis o | cat_varappearsonxaxissecond group | o y2468OptionsOptionsarepresentedunderthefollowingheadings:group optionsyvar optionsboxlook optionslegending optionsaxis optionstitle and other optionsSuboptionsforusewithover()andyvaroptions() graphbox—Boxplots7 outergap(*#)speciesthatthedefaultbemodied.Specifyingoutergap(*1.2)increasesthegapby20%,andspecifyingoutergap(*.8)reducesthegapby20%.outergap(#)speciesthegapasapercentage-of-box-widthunits.outergap(50)speciesthatthegapbehalftheboxwidth.boxgap(#)speciesthegaptobeleftbetweenyvarboxesasapercentage-of-box-widthunits.Thedefaultisboxgap(33).boxgap()affectsonlytheyvarboxes.Ifyouwanttochangethegapfortherst,second,orthirdover()group,specifytheover suboptgap()insidetheover()itself;seeSuboptionsforusewithover()andyvaroptions()below.legending optionslegend optionsallowsyoutocontrolthelegend.Ifmorethanoneyvarisspecied,alegendisproduced.Otherwise,nolegendisneededbecausetheover()groupsarelabeledonthecategoricalxaxis.See[G-3]legend options,andseeTreatmentofmultipleyvarsversustreatmentofover()groupsunderRemarksandexamplesbelow.nolabelspeciesthat,inautomaticallyconstructingthelegend,thevariablenamesoftheyvarsbeusedinpreferencetotheirlabels.yvaroptions(over subopts)allowsyoutospecifyover suboptsfortheyvars.Thisisseldomdone.showyvarsspeciesthat,inadditiontobuildingalegend,theidentitiesoftheyvarsbeshownonthecategoricalxaxis.Ifshowyvarsisspecied,itistypicaltoalsospecifylegend(off).axis optionsyalternateandxalternateswitchthesideonwhichtheaxesappear.Usedwithgraphbox,yalternatemovesthenumericalyaxisfromthelefttotheright;xalternatemovesthecategoricalxaxisfromthebottomtothetop.Usedwithgraphhbox,yalternatemovesthenumericalyaxisfromthebottomtothetop;xalternatemovesthecategoricalxaxisfromthelefttotheright.Ifyourschemebydefaultputstheaxesontheoppositesides,thenyalternateandxalternatereversetheiractions.yreversespeciesthatthenumericalyaxishaveitsscalereversedsothatitrunsfrommaximumtominimum.axis scale optionsspecifyhowthenumericalyaxisisscaledandhowitlooks;see[G-3]axis scale options.Thereyouwillalsoseeoptionxscale()inadditiontoyscale().Ignorexscale(),whichisirrelevantforboxplots.axis label optionsspecifyhowthenumericalyaxisistobelabeled.Theaxis label optionsalsoallowyoutoaddandsuppressgridlines;see[G-3]axis label options.Thereyouwillseethat,inadditiontooptionsylabel(),ytick(),:::,ymtick(),optionsxlabel(),:::,xmtick()areallowed.Ignorethex*()options,whichareirrelevantforboxplots.ytitle()overridesthedefaulttitleforthenumericalyaxis;see[G-3]axis title options.Thereyouwillalsondoptionxtitle()documented,whichisirrelevantforboxplots. graphbox—Boxplots9 sort(varname)andsort(#)controlhowtheboxesareordered.SeeHowboxesareorderedandReorderingtheboxesunderRemarksandexamplesbelow.sort(varname)putstheboxesintheorderofvarname;seePuttingtheboxesinaprespeciedorderunderRemarksandexamplesbelow.sort(#)putstheboxesinorderoftheirmedians.#referstotheyvarnumberonwhichtheorderingshouldbeperformed;seePuttingtheboxesinmedianorderunderRemarksandexamplesbelow.descendingspeciesthattheorderoftheboxes—defaultorasspeciedbysort()—bereversed.Remarksandexamplesstata.comRemarksarepresentedunderthefollowingheadings:IntroductionExamplesofsyntaxTreatmentofmultipleyvarsversustreatmentofover()groupsHowboxesareorderedReorderingtheboxesPuttingtheboxesinaprespeciedorderPuttingtheboxesinmedianorderUsewithby()VideoexampleHistoryAlsosee[G-2]graphbar.Mostofwhatissaidthereappliesequallywelltoboxplots.Introductiongraphboxdrawsverticalboxplots:.usehttp://www.stata-press.com/data/r13/bplong(fictionalbloodpressuredata).graphboxbp,over(when)over(sex)ytitle("Systolicbloodpressure")title("ResponsetoTreatment,bySex")subtitle("(120PreoperativePatients)""")note("Source:FictionalDrugTrial,StataCorp,2003") 12graphbox—Boxplots Intheseconddataset,thedataareorganizedthelongway;eachpatientisapairofobservations.Thecorrespondingobservationsintheseconddatasetare patientsexagegrpwhenbp 1Male30-45Before143 1Male30-45After153 2Male30-45Before163 2Male30-45After170 3Male30-45Before153 3Male30-45After168 Usingtherstdataset,wemighttype.usehttp://www.stata-press.com/data/r13/bpwide,clear(fictionalbloodpressdata).graphboxbp_beforebp_after,over(sex) graphbox—Boxplots15 Ifyouwantedthelargestrst,youwouldtype.graphhboxwage,over(industry,sort(1)descending)The1insort(1)referstotherst(andhereonly)yvar.Ifyouhadmultipleyvars,youmighttype.graphhboxwagebenefits,over(industry,sort(1))andyouwouldhaveachartshowingwageandbenefitssortedonwage.Ifyoutyped.graphhboxwagebenefits,over(industry,sort(2))thegraphwouldbesortedonbenefits.Usewithby()graphboxandgraphhboxmaybeusedwithby(),butingeneral,youwillwanttouseover()inpreferencetoby().Boxchartsareexplicitlycategoricalanddoanexcellentjobofpresentingsummarystatisticsformultiplegroupsinonechart.Agooduseofby(),however,iswhenthegraphwouldotherwisebelong.Considerthegraph.usehttp://www.stata-press.com/data/r13/nlsw88,clear(NLSW,1988extract).graphhboxwage,over(ind)over(union)Intheabovegraph,thereare12industrycategoriesandtwounioncategories,resultingin24separateboxes.Thegraph,presentedatnormalsize,wouldbevirtuallyunreadable.Onewayaroundthatproblemwouldbetomakethegraphlongerthanusual,.graphhboxwage,over(ind)over(union)ysize(7)SeeChartswithmanycategoriesin[G-2]graphbarformoreinformationaboutthatsolution.Theothersolutionwouldbetointroduceunionasaby()categoryratherthananover()category:.graphhboxwage,over(ind)by(union)