A very brief example could go like this:īut note that (in contrast to SPSS's filter command) any changes made to the data after preserve will be "undone" by restore.
DROP IF STATA FULL
This allows you to drop cases, do your analyses and finally return to the full data set. However, you can do analyses for a subset of your data using the if clause.Īnother way for achieving this is using the preserve - restore clause. Ss (in analogy to the filter by command in SPSS). Note that there seems to be no simple way to temporarily exclude cases from analyse Using "keep" instead of drop would keep all cases with no income. Will delete all cases whose income equals zero. If u want to keep only the sample used in a regression, then. Note that, in contrast to SPSS, you cannot drop or keep variables while saving a data set. If you want to get rid of this obs for good, type drop if variable. Using "keep" instead of drop would delete all variables not listed. Hi, I wanted to confirm whether the 'drop if' command in a panel data set drops only observations that satisfy a certain condition whereas the bysort option followed by 'drop if' drops the whole group by which the data is sorted by. The program dups is not a built-in program in Stata, but can be installed over the internet using search dups (see How can I use the search command to search for programs and get additional help. You can also subset data as you use a data file if you are trying to read a file that is too big to fit into the memory on your computer. In Stata, several programs are available to detect the duplicates and can also optionally drop the duplicates. Title drop Drop variables or observations DescriptionQuick startMenuSyntax Remarks and examplesStored resultsAlso see Description drop eliminates variables or observations from the data in memory.
You can subset data by keeping or dropping variables, and you can subset data by keeping or dropping observations. Will delete the variables listed after "drop" from your data set. This module shows how you can subset data in Stata. The same commands are used for dropping / keeping variables or cases.
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