Texas Instruments TI-89 Titanium User Manual page 108

Steps and keystrokes
2. Enter a column of numbers. Then move
the cursor up one cell (just to see that a
highlighted cell's value is shown on the
entry line).
is shown in the upper-left corner to
LIST
indicate a list variable.
You can use D instead of ¸ to enter
information in a cell.
Press 1 ¸ 2 ¸ 3 ¸ 4 ¸ 5
¸ 6 ¸ C
3. Move to column 2, and define its column
header so that it is twice the value of
column 1.
is shown in the upper-left corner to
DATA
indicate that the list variable was
converted to a data variable.
@ B † 2 p j C 1 ¸
4. Move to the column 2 header cell to show
its definition in the entry line.
When the cursor is on the header cell,
you do not need to press † to define it.
Simply begin typing the expression.
Press 2 C C
Previews
Display
Πmeans the cell is in
a defined column.
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