HP 15c - Manual (Page 143)

Section 4: Using Matrix Operations 143
Keystrokes Display
l.3 144- 45 .3
l+.3 145-45,40,.3
- 146- 30 Replaces e
i
with le
i
− 2wh, the
gradient elements.
l.2 147- 45 .2
l*.3 148-45,20,.3 Calculates lwh.
|n 149- 43 32
Now enter the necessary information and run the program.
Keystrokes Display
|¥ Run mode.
13
´m% 13.0000 Reserves R
0
through R
.3
.
|"0 13.0000 Finds local maximum.
´U 13.0000 Activates User mode.
´>1 13.0000
2 v1 1 Enters dimensions for matrix A.
´mA 1.0000 Dimensions A to 2 × 1.
15 OA 15.0000
OA 15.0000 Stores initial estimate:
l = w = 15.
3 O2 3.0000 Stores a = 3.
0.1
O3 0.1000 Stores e = 0.1 .
0.05 O4 0.0500 Stores d = 0.05 .
4 O5 4.0000 Stores N = 4.
A 4.415 04 Slope at u
1
.
4.243 04 Slope at u
2
.
3.718 04 Slope at u
3
.
2.045 04 Slope at u
4
.
Error 1
− A 2 1 Bounding search failed.
Since the results so far look promising (the derivatives are decreasing in magnitude), allow
five additional samples in this bounding search and set N = 8 for all subsequent iterations.
Keystrokes Display
5 O7 5.000 00 Sets counter to 5.
8
O5 8.000 00 Sets N to 8.
¦ -3.849 04 Slope at u
5
(sign change).
1. j + 1.