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Title stata Title stata

Title stata - PDF document

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Title stata - PPT Presentation

com clear Clear memory Syntax Description Remarks and examples Also see Syntax clear clear mata results matrix programs ado clear all Description clear by itself removes data and value labels from memory an ID: 8606

com clear Clear memory

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2clear—Clearmemory clearallandclear*aresynonyms.Theyremovealldata,valuelabels,matrices,scalars,constraints,clusters,storedresults,sersets,andMatafunctionsandobjectsfrommemory.Theyalsocloseallopenlesandpostles,cleartheclasssystem,closeanyopenGraphwindowsanddialogboxes,dropallprogramsfrommemory,andresetalltimerstozero.Theyareequivalenttotyping.version13.drop_all(see[D]drop).labeldrop_all(see[D]label).matrixdrop_all(see[P]matrixutility).scalardrop_all(see[P]scalar).constraintdrop_all(see[R]constraint).clusterdrop_all(see[MV]clusterutility).fileclose_all(see[P]le).postutilclear(see[P]postle)._returndrop_all(see[P]_return).discard(see[P]discard).programdrop_all(see[P]program).timerclear(see[P]timer).mata:mataclear(see[M-3]mataclear)Remarksandexamplesstata.comYoucancleartheentiredatasetwithoutaffectingmacrosandprogramsbytypingclear.Youcanalsotypeclearall.Thiscommandhasthesameresultasclearbyitselfbutalsoclearsmatrices,scalars,constraints,clusters,storedresults,sersets,Mata,theclasssystem,businesscalendars,andprograms;closesallopenlesandpostles;closesallopenGraphwindowsanddialogboxes;andresetsalltimerstozero. Example1Weloadthebpwidedatasettocorrectamistakeinthedata..usehttp://www.stata-press.com/data/r13/bpwide(fictionalbloodpressuredata).listin1/5 patientsexagegrpbp_bef~ebp_after 1. 1Male30-45143153 2. 2Male30-45163170 3. 3Male30-45153168 4. 4Male30-45153142 5. 5Male30-45146141 .replacebp_after=145in3(1realchangemade)Wemadeanothermistake.Wemeanttochangethevalueofbp afterinobservation4.Itiseasiesttobeginagain..clear.usehttp://www.stata-press.com/data/r13/bpwide(fictionalbloodpressuredata)