Filter
Top Products
Page 2-17
Using function PURGE in the stack in RPN mode
Assuming that our variable list contains the variables p1, z1, Q, R, and α.
We will use command PURGE to delete variable p1. Press ³@@p1@@ `
I @PURGE@. The screen will now show variable p1 removed:
To delete two variables simultaneously, say variables R and Q, first create a
list (in RPN mode, the elements of the list need not be separated by commas
as in Algebraic mode):
J „ä³ @@@R!@@ ™ ³ @@@Q!@@ `
Then, press I@PURGE@ use to purge the variables.
Additional information on variable manipulation is available in Chapter 2 of
the calculator’s user’s guide.
UNDO and CMD functions
Functions UNDO and CMD are useful for recovering recent commands, or to
revert an operation if a mistake was made. These functions are associated
with the HIST key: UNDO results from the keystroke sequence ‚¯, while
CMD results from the keystroke sequence „®.
CHOOSE boxes vs. Soft MENU
In some of the exercises presented in this chapter we have seen menu lists of
commands displayed in the screen. This menu lists are referred to as
CHOOSE boxes. Herein we indicate the way to change from CHOOSE
boxes to Soft MENUs, and vice versa, through an exercise.
Although not applied to a specific example, the present exercise shows the
two options for menus in the calculator (CHOOSE boxes and soft MENUs). In