Manipulating the stack
Reverse Polish Notation (RPN)
Suppose further that you want to determine the minimum of just
the numbers on stack levels 1, 2, and 3. You choose the MIN
function from the MATH menu and complete the entry as
MIN(3). When you press
three items on the stack is displayed.
A number of stack-manipulation options are available. Most
appear as menu items across the bottom the screen. To see these
items, you must first select an item in history:
Copies the selected item to stack level 1. The item below the one
that is copied is then highlighted. Thus if you tapped
times, four consecutive items will be moved to the bottom four
stack levels (levels 1–4).
There are two roll commads:
to move the selected item to stack level 1. This is
duplicate being placed on stack level1. However,
doesn't duplicate an item. It simply moves it.
to move the item on stack level 1 to the currently
, the minimum of just the last
duplicates the item, with the