Texas Instruments TITANIUM TI-89 User Manual page 530

Press A or B to remove the highlighting. Then edit the old expression.
•
To cancel any changes, press N before pressing ¸.
Note:
You can use an expression that: For example:
Generates a series of numbers.
Refers to another column.
The seq function is described in the Technical Reference module. If you refer
Note:
to an empty column, you will get an error message unless
3. Press ¸, D, or C to save the
definition and update the columns.
Ê
c1=seq(x,x,1,7);
Œ
cell ( ) since it is defined by the column header.
For a data variable, header definitions are saved when you leave the Data/ Matrix
Note:
Editor. For a list variable, the definitions are not saved (only their resulting cell values).
Data/Matrix Editor
c1=seq(x^2,x,1,5)
c1={1,2,3,4,5}
c2=2
c4=c1
Ë Ì
ù
c2=2 c1; You cannot directly change a locked
ù
c1
ù
c2–sin(c3)
Ê Ë
Ì
Auto-calculate = OFF
.
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