Scripting Guide - SAS

662 JSL Syntax Reference Appendix A
Row Functions
Row Functions
Count(from, to, step, times)
Description
Used for column formulas. Creates row by row the values beginning with the from value and ending
with the to value. The number of steps specifies the number of values in the list between and
including the from and to values. Each value determined by the first three arguments of the count
function occurs consecutively the number of times that you specify. When the to value is reached,
count starts over at the from value. If the from and to arguments are data table column names, count
takes the values from the first row only. Values in subsequent rows are ignored.
Returns
The last value.
Arguments
from Number, column reference, or expression. Count starts counting with this value.
to Number, column reference, or expression. Count stops counting with this value.
step Number or expression. Specifies the number of steps to use to count between from and to,
inclusive.
times Number or expression. Specifies the number of times each value is repeated before the next step.
Examples
For Each Row(:colname[row()]=count(0, 6, 3, 1))
//The rows in the column named colname are filled with the series 0, 3, 6, 0,
... until all rows are filled.
For Each Row(:colname[row()]=count(0, 6, 3, 2))
//The rows in the column named colname are filled with the series 0, 0, 3, 3,
6, 6, 0, ... until all rows are filled.
Note
Count() is dependent on Row(), and is therefore mainly useful in column formulas.
Dif(col, n)
Description
Calculates the difference of the value of the column col in the current row and the value n rows previous
to the current row.
Returns
The difference.
Arguments
col A column name (for example, :age).
n A number.