Operation Manual

10-4 Matrices

8210MTRX.DOC TI-82, Chapter 10, English Bob Fedorisko Revised: 02/09/01 9:18 AM Printed:

02/09/01 12:38 PM Page 4 of 14

Defining a Matrix

A matrix is a two-dimensional array. You can display, enter, or edit a matrix in the

matrix editor. The TI

82 has five matrix variables:

, or

. You can

define a matrix directly in an expression.

Selecting a Matrix

To define or display a matrix in the editor, you first must select the name of

the matrix.

1. Press



to display the

MATRX EDIT

menu.

2. Select the matrix you want to define (either

, or

). The

MATRX EDIT

screen appears.

Accepting or Changing Matrix Dimensions

The dimensions of the matrix (row × column) are displayed on the top line.

When you select a matrix to define, the cursor is on the row dimension.

You must accept or change the dimensions each time you enter or edit a

matrix. A “new” matrix has dimension 1×1.

1. Accept or change the number of rows.

To accept the number, press

To change the number, enter the number of rows (up to 99), and then

press

The cursor moves to the number of columns.

2. Accept or change the number of columns as above.

The rectangular cursor moves to the first matrix element.