Section 12: Calculating with Matrices 149
there are certain operations for which the result matrix can not be the
same one as either of the matrices being operated on—this is noted in the
description of these operations.)
While the key used for any matrix operation that stores a result in the
result matrix is held down, the descriptor of the result matrix is displayed.
If the key is released within about 3 seconds, the operation is performed,
and the descriptor of the result matrix is placed in the X-register. If the
key is held down longer, the operation is not performed and the calculator
displays null.
Copying a Matrix
To copy the elements of a matrix into the corresponding elements of
another matrix, use the O > sequence:
1. Press l > followed by the letter key specifying the
matrix to be copied. This enters the descriptor of the matrix into the
display.
2. Press O > followed by the letter key specifying the
matrix to be copied into.
If the matrix specified after l does not have the same dimensions as
the matrix specified after O, the second matrix is redimensioned to
agree with the first. The matrix specified after O need not already be
dimensioned.
Example: Copy matrix A from the previous example into matrix B.
Keystrokes Display
l > A
A 2 3
Displays descriptor of
matrix to be copied.
O > B
A 2 3
Redimensions matrix B
and copies A into B.
l > B
b 2 3
Displays descriptor of
new matrix B.
One-Matrix Operations
The following table shows functions that operate on only the matrix
specified in the X-register. Operations involving a single matrix plus a
number in another stack register are described under Scalar Operations
(page 151).
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