Transcription of Title stata.com collapse — Make dataset of summary …
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Title stata.com collapse — Make dataset of summary …
make dataset of summary statisticsSyntaxMenuDescriptionOptionsRe marks and examplesAcknowledgmentAlso seeSyntaxcollapseclist[if] [in] [weight] [,options]whereclistis either[(stat)]varlist[ [(stat)]..][(stat)]targetvar=varname[tar getvar=varname..] [ [(stat)]..]or any combination of thevarlistandtargetvarforms, andstatis one ofmeanmeans (default)sumsumsmedianmediansrawsumsums, ignoring optionally specified weightp11st percentileexcept observations with a weight ofp22nd percentilezero are excluded..3rd 49th percentilescountnumber of nonmissing observationsp5050th percentile (same asmedian)percentpercentage of nonmissing observations..51st 97th percentilesmaxmaximumsp9898th percentileminminimumsp9999th percentileiqrinterquartile rangesdstandard deviationsfirstfirst valuesemeanstandard error of the meanlastlast value(sd/sqrt(n))firstnmfirst nonmissing valuesebinomialstandard error of the mean, binomiallastnmlast nonmissing value(sqrt(p(1-p)/n))sepoissonstandard error of the mean, Poisson(sqrt(mean))Ifstatis not specified,meanis (varlist)groups over whichstatis to be calculatedcwcasewise deletion instead of all possible observationsfastdo not restore the original dataset should the user pressBreak; programmer scommandvarlistandvarnameinclistmay contain time-series operators; see[U] Time-series ,fweights,iweights, andpweights are allowed.
want summary statistics for age and income, collapse will, by default, use all 25,000 observations when calculating the summary statistics for age. If we prefer that collapse use only the 15,000
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