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8. Press * to calculate X
elements are placed in the result matrix, and the descriptor of
the result matrix is placed in the X-register.
9. If you want the product in the form (YX)
Note that you don't transform X
You can derive the complex elements of the matrix product YX by recalling
the elements of (XY)
conventions described earlier.
Example: Calculate the product ZZ
in the preceding example.
Since elements representing both matrices are already stored ( in A and
-1
P
(Z
)
in B), skip steps 1, 3, 4, and 6.
Keystrokes
l>A
l>B
´<C
*
´U
lC
lC
lC
lC
lC
lC
lC
lC
´U
Section 12: Calculating with Matrices
P
= (YX)
P
into .
P
C
or (YX)
and combining them according to the
-1
, where Z is the complex matrix given
Display
A
4
b
4
b
4
C
4
C
4
C
1,1
1.0000
–2.8500 –10
–4.0000 –11
1.0000
1.0000 –11
3.8000 –10
1.0000 –11
–1.0500 –10
–1.0500 –10
P
. The values of these matrix
C
, press |c
4 Displays descriptor of matrix A.
2 Displays descriptor of matrix
B.
2 Designates C as result matrix.
2 Calculates
2 Activates User mode.
Matrix C, row 1, column 1.
(Displayed momentarily while
last key held down.)
Value of c
.
11
Value of c
.
12
Value of c
.
21
Value of c
.
22
Value of c
.
31
Value of c
.
32
Value of c
.
41
Value of c
.
42
Deactivates User mode.
167
-1
P
-1
P
(Z
)
= (ZZ
)
.
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