HP HP-28S User Manual

Example.
Sort the list { 8, 3, 1, 2, 5 }.
I USER I
OJ 8,3,1,2,5 SORT
LMED (Median of a List)
3:
2:
1: ( 1 2 3 5 8 )
mDlBIlI1IlmlIl!mma~
Given a sorted list, calculate the median. If the list contains an odd
number of elements, the median is the value of the center element. If
the list contains an even number of elements, the median is the aver-
age value
of the elements just above and below the center.
Arguments Results
1 :
{
sorted list ::-
1 :
median of sorted list
Techniques:
• FLOOR
and CEIL. For an integer, FLOOR and CEIL both return
that integer; for a non-integer, FLOOR and CEIL return successive
integers
that bracket the non-integer.
Program
DUP SIZE
1 + 2 .....
DUP
p FLOOF.: GET
::;~·lAP
p CEIL GET
Comments
Begin the program.
The size of the list.
The center position in the list
(fractional for even-sized lists).
Store
the center position in local
variable
p.
Begin the defining program.
Make a copy of the list.
Get the number at or below the
center position.
Move the list to level 1.
Get the number at or above the
center position.
272 28: Programming Examples

HP HP-28S Specifications

General

Brand	HP
Model	HP-28S
Category	Calculator
Language	English