Texas Instruments PLUS TI-89 - Manual (Page 367)

350 Chapter 21: Memory and Variable Management
21MEMORY.DOC TI-89/TI-92 Plus:Memory & Variables Mgmt (English) Susan Gullord Revised: 02/23/01 1:20 PM Printed: 02/23/01 2:19 PM Page 350 of 16
Steps
³
TI-89
Keystrokes
›
TI-92 Plus
Keystrokes Display
1. From the Home screen, assign
variables with the following
variable types.
Expression: 5 ! x1
Function: x ñ +4 ! f(x)
List: {5,10} ! l1
Matrix: [30,25] ! m1
" M
5 § X 1
¸
X Z 2 « 4 §
j F c X d
¸
2 [ 5 b 1 0
2 \ §
j L 1 ¸
2 g 3 0 b 2 5
2 h §
j M 1 ¸ ¥ " M
5 § X 1
¸
X Z 2 « 4 §
F c X d
¸
2 [ 5 b 1 0
2 \ §
L 1 ¸
2 g 3 0 b 2 5
2 h §
M 1 ¸
2. Suppose you start to perform an
operation using a function
variable but can’t remember its
name.
5 p 5 p
5ù
3. Display the VAR-LINK screen.
This example assumes that the
variables assigned above are the only
ones defined.
2 ° 2 °
4. Change the screen’s view to
show only function variables.
Although this may not seem
particularly useful in an example with
four variables, consider how useful it
could be if there were many variables
of all different types.
„ D D B 5
¸ „ D D B 5
¸
Preview of Memory and Variable Management
Assign values to a variety of variable data types. Use the VAR-LINK screen to view a list of
the defined variables. Then move a variable to the user data archive memory and explore
the ways in which you can and cannot access an archived variable. (Archived variables
are locked automatically.) Finally, unarchive the variable and delete the unused variables
so that they will not take up memory.