Texas Instruments TITANIUM TI-89 User Manual

Page 530

Data/Matrix Editor

530

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Press

A or B to remove the highlighting. Then edit the old expression.

Note:

To cancel any changes, press

N before pressing ¸.

Note:

The seq function is described in the Technical Reference module. If you refer

to an empty column, you will get an error message unless

Auto-calculate = OFF

Note:

For a data variable, header definitions are saved when you leave the Data/ Matrix

Editor. For a list variable, the definitions are not saved (only their resulting cell values).

You can use an expression that: For example:

Generates a series of numbers.

c1=seq(x^2,x,1,5)
c1={1,2,3,4,5}

Refers to another column.

c2=2

c4=c1

c2–sin(c3)

3. Press

¸, D, or C to save the

definition and update the columns.

c1=seq(x,x,1,7);

c2=2

c1;

You cannot directly change a locked

cell (

) since it is defined by the column header.

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