Matrices
Matrices can be typed in by row or edited in the matrix editor.
The editor is accessed by pressing 
.
Then, select a name for the matrix by selecting one of
the numbers on the list and enter the dimensions of the matrix. For example,
to create a 2 x 3 matrix (2 rows 3 columns) named A, press
followed by
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.
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.