HP 15c User 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.