HP 50G, Руководство пользователя

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Notice that variable A12 is no longer there. If you now press
„§
, the
screen will show the contents of sub-directory MANS, including variable A12 :
Deleting variables
Variables can be deleted using function PURGE. This function can be accessed
directly by using the TOOLS menu (
I
), or by using the FILES menu
„¡
@@OK@@
.
Using the FILES command
The FILES command can be used to purge one variable at a time. To delete a
variable from a given directory you can use the FILES menu. For example, within
the sub-directory {HOME MANS INTRO}, we have variables
p1, z1, R, Q,
α
,
and A left. Suppose that we delete variable A . Here is how to do it: Press
„¡
@@OK@@
to produce the variable list. Use the down-arrow key
˜
to
select variable A (the last in the list), then press
L
@PURGE@ @@@YES@@@
. The screen
will now show the contents of sub-directory INTRO without variable A.
Using function PURGE in the stack in Algebraic mode
We start again at subdirectory {HOME MANS INTRO} containing now only
variables
p1, z1, Q, R, and
α
. We will use command PURGE to delete
Note: You can use the stack to move a variable by combining copying with
deleting a variable. Procedures for deleting variables are demonstrated in
the next section.