
By design, the HP 48 makes it easy to move between one type
of object and another as one solves a problem, explores data, or
communicates results. It accomplishes this by using an object stack (or
“stack,” for short).
Envision the stack as a special kind of “card box” in which the HP 48
organizes all of the objects it uses in the course of calculating, solving,
plotting, and evaluating.
Each object, no matter its size, occupies exactly one “card” in the
"card box.” The object on the first “card” is said to be on “stack level
1,” the object on the second card is on “stack level 2,” and so forth.
The stack can contain any number of objects—from zero to as many
as available memory permits.
The main display of the HP 48 is the stack display. It is merely a
window showing you a portion of the stack at a time.
i Hflhir f
3:
2:
1:
Stack Display
Window
Envisioning the Stack
Objects enter and “leave” the stack at level 1. When you enter a
new object, you place it in the front of the “card box” (stack level
1) thereby pushing objects already in the “box” farther to the back
(increasing their stack levels each by one in the process).
Introducing the HP 48 2-3
Komentarze do niniejszej Instrukcji