HP 49g Graphing Calculator - Manual (Page 226)

Using the stack
In order to perform operations in RPN mode, you place the object or
objects on the stack, then apply the operation.
Entries on the stack are luunbered (as in the
example at the right). Each entry on the
stack has an associated Level. The level is the
nimiber of the line on which the entry
appears. In the example at the right, 58 is on
level 4, 6 is on level 3, 78745 is on level 2, and
so on.
Bfiti HVZ HEH R= 'K'
iHOHEI ________
4:
3:
l:
58
____ 6
■18745
93.514704726
To set RPN mode, press (MODE) to access the Calculator Modes input form,
and set the Operating mode option to RPN.
Placing objects on the stack
You can create new objects and place them on the stack, or you can
retrieve objects from memoiy? and place them on the stack.
® To enter a number on the stack:
a. Use the numeric keys to enter the nmnber. The number appears on
the command line.
b. Wlien you finish entering the number, press (ENTER). The number
appears on level 1 of the stack.
® To enter an object that you create in an application, such as a matrix or
an equation:
a. Access Matrix Writer or Equation Writer.
b. Create the matrix or the equation.
c. Press (ENTER) to place it on level 1 of the stack.
® To retrieve an object from memory and place it on the stack:
a. Press @) to display the directories and variables in the current
directory.
b. Navigate to the directory that holds the object you want.
c. Press tire appropriate function key to select the object. It appears
on level 1 of the stack.
When you add a new item to the stack, the existing items are pushed up a
level. That is, the item at level 1 is pushed up to level 2, and the item at
level 2 is pushed up to level 3 and so on.
Page E-2 Working in RPN mode