select (dataloop)¶
Purpose¶
Selects specific rows (observations) in a data loop based on a logical expression.
Format¶
select logical_expression;
Examples¶
select age > 40 AND sex $== 'MALE';
Remarks¶
Selects only those rows for which logical_expression is TRUE
. Any
variables referenced must already exist, either as elements of the
source dataset, as extern
’s, or as the result of a previous make
,
vector
, or code statement.
See also