How To Merge Data In Stata

June 11, 2019

Data-data mengenai How To Merge Data In Stata.

Merge the dads3 file with the kids3 file using famid to match them. Merge example 1 type help merge for more details pudssotr 3 merge 11 country year using mydata2 result of obs.

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There are in theory four kinds of merges.

How to merge data in stata. In stata version 11 and later. Seed joinby when you want to combine datasets horizontally but form all pairwise combinations within group. Not matched 0.

That is an oversimpliﬁcation because merge does not require that the datasets have the same observations. To merge two data sets in stata first sort each data set on the key variables upon which the merging will be based. Merge is appropriate for instance when you have data on survey respondents and then receive data on part 2 of the questionnaire.

Sort the dads data file on famid and save that file as dads3. In a one to one merge one observation from the master data set is combined with one observation from the using data set. Sort dads on famid and save that file as dads3 2.

2matched 12 merge3 mydata1 mydata2. This page describes usage of an older version of the merge command prior to stata 11 which allowed multiple files to be merged in the same merge command. The 4 steps are shown below.

Use the dads3 file 4. Orange box ceo 7489504 views. Where dataset is the name of the data set you want to append.

Merge 11 varlist using filename options. Make sure one dataset is loaded into stata in this case mydata1 then use merge. Sort kids on famid and save that file as kids3 3.

Stata calls it merging when observations from the two data sets are combined. Then use the merge command followed by a list of key variables and data sets. The current version of merge uses a different syntax requiring a 11 m1 or 1m specification and does not allow more than one file to be merged in a single merge command.

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