Miscellaneous Operations Involving Matrices; Using A Matrix Element With Register Operations; Using Matrix Descriptors In The Index Register - HP -15C Owner's Handbook Manual

A problem using this procedure is given in the HP-15C Advanced Functions
Handbook under Solving a Large System of Complex Equations.

Miscellaneous Operations Involving Matrices

Using a Matrix Element With Register Operations

If a letter key specifying a matrix is pressed after any of the following
function keys, the operation is performed using the matrix element specified
by the row and column numbers in R
storage register.
*
O
O{+, -, *, ÷} l{+
e
X

Using Matrix Descriptors in the Index Register

In certain applications, you may want to perform a programmed sequence
of matrix operations using any of the matrices A through E. In this
situation, the matrix operations can refer to whatever matrix descriptor is
stored in the index register (R
If the Index register contains a matrix descriptor:

Pressing % after any of the functions listed above performs the
operations using the element specified by R
specified in R
Pressing % after O| or l| performs the operation

using the element specified by the row and column numbers in the
Y- and X-registers and the matrix specified in R
*
Also, in User mode the row and column numbers in R
dimensions of the specified matrix.
Section 12: Calculating with Matrices
0
).
I
.
I
and R , just as though it were a data
1
*
l
-
,
÷}
I
and R
0
and R are incremented according to the
0 1
173
*
, ,
and the matrix
1
I.