HP -15C Advanced Functions Handbook page 161

Keystrokes
Section 4: Using Matrix Operations 1 59
Display
0.3923
0.6961
1.0000
1.0000
Eigenvector for X
3
.
Deactivates User mode.
If matrix A is no larger than 3 X 3 , this program can be included
with the previous eigenvalue program. Since the eigenvalue
program modifies matrix A, the original eigenvalues must be
saved and the original matrix reentered in matrix A before
running the eigenvector program. The following program can be
added to store the calculated eigenvalues in matrix E.
Keystrokes Display
127-42,21,15
128-45,23,11
129- 44 0
130- 1
131-42,23,15
132-42,21, 8
133- 45 0
134- 36
135-45,43,11
136- 45 0
137- 1
138-44,43,15
139-42, 5, 0
140- 22 8
141-42,16, 1
142- 4 3 3 2
Dimensions E to n X 1.
Recalls diagonal element.
Stores an i
Resets R
0
= R
:
= 1.
Run mode.
Labels used: E and 8.
Registers used: no additional registers.
Matrices used: A (from previous program) and E (eigenvalues).
To use the combined eigenvalue, eigenvalue storage, and
eigenvector programs for an A matrix up to 3 X 3:
1. Execute the eigenvalue program as described earlier.