Reading Repeating Blocks of Data (3)

Creating Multiple Observations from a Single Record

Reading Repeating Blocks of Data

Using the Double Trailing At Sign (@@) to Hold the Current Record

Normally, each time a DATA step executes, the INPUT statement reads a new record. But when you use the @@, the INPUT statement holds the current record and reads the next value.

input score;

1---+----10---+-

102 92 78 103

84 23 36 75

Program Data Vector

input score @@;

1---+----10---+-

102 92 78 103

84 23 36 75

Program Data Vector

A record held by the double trailing at sign (@@) is not released until

the input pointer moves past the end of the record. Then the input pointer moves down to the next record.

1---+----10--V+-

102 92 78 103

84 23 36 75

an INPUT statement without a line-hold specifier executes.

input ID $4. @@; . . input Department 5.;