## Matrices

Matrices can be typed in by row or edited in the matrix editor.
The editor is accessed by pressing
.

While in the matrix edit mode, type in a name for the matrix.
For example to name it matrix A, press
.

Then, enter the dimensions of the matrix. For example,
to create a 2 x 3 matrix (2 rows 3 columns) named A, press

The "1 , 1 = 0" on the bottom of the screen means that the row 1, column 1 entry is 0.
Navigate among the rows and columns using the cursor keys.

Press the key to move to the next
element on the right and from the end of one row to the beginning of the next.

There are several matrix operations in the matrix menu (
)
under `MATH`

, `OPS`

, and `CPLX`

. Many of the
normal operations such as multiplication, x^{-1}, and even `sin`

work on matrices, though they are often given different definitions in this
context.

#### Note:

When viewing a matrix to large to fit on the screen the TI will indicate this with
ellipses (...) to the right and/or left, and an arrow top and/or bottom.
Use the cursor keys to see more.