keep (dataloop)#

Purpose#

Specifies columns (variables) to be saved to the output dataset in a data loop.

Format#

keep variable_list;

Examples#

keep age, pay, sex;

Remarks#

Commas are optional in variable_list.

Retains only the specified variables in the output dataset. Any variables referenced must already exist, either as elements of the source dataset, or as the result of a previous Format, vector, or code statement.

If neither Format nor drop is used, the output dataset will contain all variables from the source dataset, as well as any newly defined variables. The effects of multiple Format and drop statements are cumulative.