HP 15c - Manual (Page 134)

134 Section 4: Using Matrix Operations
134
Keystrokes Display
lC -0.5000
lC 1.0000 Eigenvector forλ
2
.
lC -0.5000
6.8730 C 0.7371
Uses λ
3
=6.8730
(approximation).
¦ 1.9372 -06
¦ 1.0000 -10
¦ 0.0000
lC 0.3923
lC 0.6961 Eigenvector forλ
3
.
lC 1.0000
´U 1.0000 Deactivates User mode.
If matrix A is no larger than 3×3, 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
´bE 127-42,21,15
lmA 128-45,23,11
O0 129- 44 0
1 130- 1
´mE 131-42,23,15 Dimensions E to n × 1.
´b8 132-42,21, 8
l0 133- 45 0
v 134- 36
l|A 135-45,43,11 Recalls diagonal element.
l0 136- 45 0
1 137- 1
O|E 138-44,43,15 Stores a
ii
in e
i
.
´e0 139-42, 5, 0
t8 140- 22 8
´>1 141-42,16, 1 Resets R
0
=R
1
=1.
|n 142- 43 32
|¥
Run mode.