Transcription of Stata: Software for Statistics and Data Science | Stata
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Stata: Software for Statistics and Data Science | Stata
Merge datasetsSyntaxMenuDescriptionOptionsRema rks and examplesReferencesAlso seeSyntaxOne-to-one merge on specified key variablesmerge 1:1varlistusingfilename[,options]Many-to -one merge on specified key variablesmerge m:1varlistusingfilename[,options]One-to- many merge on specified key variablesmerge 1:mvarlistusingfilename[,options]Many-to -many merge on specified key variablesmerge m:mvarlistusingfilename[,options]One-to- one merge by observationmerge 1:1n usingfilename[,options]optionsDescriptio nOptionskeepusing(varlist)variables to keep from using data; default is allgenerate(newvar)name of new variable to mark merge results; default ismergenogeneratedo not createmergevariablenolabeldo not copy value-label definitions from usingnonotesdo not copy notes from usingupdateupdate missing values of same-named variables in master with valuesfrom usingreplacereplace all values of same-named variables in master with nonmissingvalues from using (requiresupdate)noreportdo not display match result summary tableforceallow string/numeric variable type mismatch without errorResultsassert(results)specify required match resultskeep(results)specify which match results to keepsorteddo not sort; dataset already sortedsorteddoes not appear in the dialog merge Merge datasetsMenuData>Combine datasets>Merge two datasetsDescriptionmergejoins corresponding observations from the dataset currently in memory (cal)
Call the dataset in memory the master dataset, and the dataset on disk the using dataset. This way we have general names that are not dependent on individual datasets. Suppose we have two datasets, master in memory on disk in file filename id age id wgt 1 22 1 130 2 56 2 180 5 17 4 110 We would like to join together the age and weight ...
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