Texas Instruments TI-89, TI-92

Chapter 13: Tables 227

13TABLES.DOC TI-89/TI-92 Plus: Tables (English) Susan Gullord Revised: 02/23/01 1:08 PM Printed: 02/23/01 2:16 PM Page 227 of 10

Cell width determines the maximum number of digits and symbols

(decimal point, minus sign, and “í” for scientific notation) that can

be displayed in a cell. All cells in the table have the same width.

To change the cell width from the

Table screen:

1. Press ƒ 9

— or —

TI-89: ¥ Í

TI-92 Plus: ¥ F.

2. Press B or A to display a menu

of valid widths (3 – 12).

3. Move the cursor to highlight a number and press ¸. (For

single-digit numbers, you can type the number and press ¸.)

4. Press ¸ to close the dialog box and update the table.

Whenever possible, a number is shown according to the currently

selected display modes (Display Digits, Exponential Format, etc.). The

number may be rounded as necessary. However:

¦ If a number’s magnitude is too large for the current cell width, the

number is rounded and shown in scientific notation.

¦ If the cell width is too narrow even for scientific notation, “...” is

shown.

By default, Display Digits = FLOAT 6. With this mode setting, a number

is shown with up to six digits, even if the cell is wide enough to show

more. Other settings similarly affect a displayed number.

If cell width is:

Full Precision 3 6 9 12

1.2345678901 1.2 1.2346 1.23457 1.23457

ë123456.78 ... ë1.2E5ë123457. ë123457.

.000005 ... 5.Eë6 .000005 .000005

1.2345678E19 ... 1.2E19 1.2346E19 1.23457E19

ë1.23456789012Eë200 ... ... ë1.2Eë200 ë1.2346Eë200

A cell shows as much as possible of a complex number (according to

the current display modes) and then shows “...” at the end of the

displayed portion.

When you highlight a cell containing a complex number, the entry

line shows the real and imaginary parts with a maximum of four

digits each (FLOAT 4).

Changing the

Cell Width

Note: By default, the cell

width is 6.

How Numbers Are

Displayed in a Cell

Note: If a function is

undefined at a particular

value,

undef

is displayed in

the cell.

Tip: Use

to set the

display modes.

Tip: To see a number in full

precision, highlight the cell

and look at the entry line.

If Results are

Complex Numbers

Note: Depending on display mode settings, some values are

not shown in full precision even when the cell is wide enough.