HP 3000 Manuals HP 3000 Manuals
MEDIAN Function
The MEDIAN function returns the content of the parameter whose value is
the middle value in a list formed by arranging the parameters in sorted
order. The function type is numeric.
Syntax
FUNCTION MEDIAN ({parameter-1}...)
Parameters
parameter-1 Must be class numeric.
Return Value
The value returned is the content of parameter-1 having the middle value
in a list formed by arranging all the parameter-1 values in sorted order.
If the number of occurrences referenced by parameter-1 is odd, the
returned value is such that at least half of the occurrences referenced
by parameter-1 are greater than or equal to the returned value and at
least half are less than or equal. If the number of occurrencces
referenced by parameter-1 is even, the returned value is the arithmetic
mean of the values referenced by the two middle occurrences.
The comparisons used to arrange the parameter-1 values in sorted order
are made according to the rules for simple conditions. See the section
"Simple Conditions" in Chapter 8 for additional information.
Example
01 TAB.
05 ELEMENT PIC S999V99
OCCURS 4 TIMES VALUE ZERO.
01 NUM-MEDIAN PIC S999V99 VALUE ZERO.
:
MOVE 1.25 TO ELEMENT (1).
MOVE 3.50 TO ELEMENT (2).
MOVE 8.75 TO ELEMENT (3).
MOVE 0.25 TO ELEMENT (4).
COMPUTE NUM-MEDIAN = FUNCTION MEDIAN (1, 7, 9, 23, 85).
DISPLAY NUM-MEDIAN.
COMPUTE NUM-MEDIAN = FUNCTION MEDIAN ( ELEMENT (ALL) ).
DISPLAY NUM-MEDIAN.
The above example displays the following:
+009.00
+002.37