TI-83 PlusMatrices268
3.Press ¿.
4.Press y > again and select the name of the new matrix to
which you want to copy the existing matrix.
5. Press Í to copy the matrix to the new matrix name.
Accessing a Matrix Element
On the home screen or from within a program, you can store a value to,
or recall a value from, a matrix element. The element must be within the
currently defined matrix dimensions. Select matrix from the MATRX NAMES
menu.
[matrix](row,column)