Texas Instruments TI-89 Manual Do Utilizador
Data/Matrix Editor
529
1. Move the cursor to any cell in the column and press
†.
– or –
Move the cursor to the header cell (
c1
,
c2
, etc.) and press
¸.
Notes:
•
¸ is not required if you want to type a new definition or replace the existing
one. However, if you want to edit the existing definition, you must press
one. However, if you want to edit the existing definition, you must press
¸.
•
To view an existing definition, press
† or move the cursor to the header cell
and look at the entry line.
2. Type the new expression, which replaces any existing definition.
If you used
† or ¸ in Step 1, the cursor moved to the entry line and highlighted
the existing definition, if any. You can also:
•
Press
M to clear the highlighted expression. Then type the new expression.
– or –