HP -15C Advanced Functions Handbook page 145

Section 4: Using Matrix Operations 143
You can also solve weighted least-squares problems and linearly
constrained least-squares problems using this program. Make the
necessary substitutions described under Orthogonal Factorization
earlier in this section.
Program mode.
Program to input new
row.
Stores weight in R
2
.
Stores / = 1 in Ri.
Stores k = p + 2 in R
0
.
Keystrokes
|T| CLEAR | PRGM |
[f][LBU][A]
[STOl2
1
rsToii
EQ1Q4
|RCL||DIM|[Al
| * S y |
rsToio
miTBLlS
[Rcpi
[R/Sl
| R C L | 2
s
[T|| USER HSTOlfAl
[T|| USER!
| GTO | 5
[GTCTU
Etna®
Display
000-
001-42,21,11
002-
44 2
003-
1
004-
44 1
005-42,21, 4
006-45,23,11
007-
34
008-
44 0
009-42,21, 5
010-
45 1
011-
31
012-
45 2
013-
20
01 4u 44 11
015-
22 5
016-
22 4
017-42,21,12
|RCL||DIMl[Al
QD[cF]o
|RCL|2
IRCLIO
018-45,23,11
019-
34
020-
44 2
021-42,16, 1
022-42,21, 1
023-43, 5, 0
024-
45 2
025-
45 0
026-45,43,11
027- 4 5 1 1
Program to update
matrix A.
Recalls dimensions/) + 2
and/> + 1.
Stores/) + 2 in R
2
.
Sets k = 1 = 1.
Branch to update ith row.
Recalls a
p + 2
,k-
Recalls a\,i,.