Matrix Operations on the TI83/84
Written by Jeff O’Connell –
[email protected]
Ohlone College
http://www2.ohlone.edu/people2/joconnell/ti/
Entering a Matrix:
Press [2
nd
][MATRX] (TI83+/84) or [MATRX] (TI83) to see a screen with a menu
that looks as shown in
screen 1
. The dimensions on the right of the names show that
there is a matrix stored there. To enter a matrix scroll to [EDIT] then down to the
matrix name you want, press [ENTER]. You are then asked for the size of the
matrix (rows
!
columns), then you may enter the values for each entry. Pressing
enter after each value moves you to the left until the end of the row, pressing enter
again moves you to the next row. After the matrix has been entered press
[2
nd
][QUIT] to return to the home screen. Once the matrix has been entered you can
select the matrix from [NAMES] in the matrix menu. The rest of the examples will
be in reference to the matrix shown in
screen 2
.
Screen 1
Screen 2
Row operations
: The three row operations can be found by pressing [MATRX], scrolling to [MATH] and scrolling down (or up).
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 Arabhi,Sundararajan
 Matrix Operations, Row echelon form, th e matr

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