HP-15C Advanced Functions Handbook
Description
One-Step Residual Correction
The following program solves the system of equations AX = B for X, then performs one
stage iterative refinement to improve the solution. The program uses four matrices:
Matrix A B C D
———————————————————————————————————————————————————
Input System Right-Hand
Matrix Matrix
Output System Corrected Uncorrected LU Form
Matrix Solution Solution of A
To use this program:
- Dimension matrix A according to the system matrix and store those elements in A.
- Dimension matrix B according to the right-hand matrix and store those elements in B.
- Press GSB A to calculate the corrected solution in matrix B
Program Resources
Labels
Name |
Description |
|
A |
Residual Correction |
|
Program
Line |
Display |
Key Sequence |
|
000 |
|
|
|
001 |
42,21,11 |
f LBL A |
|
002 |
45,16,11 |
RCL MATRIX A |
|
003 |
44,16,14 |
STO MATRIX D |
|
004 |
45,16,12 |
RCL MATRIX B |
|
005 |
45,16,14 |
RCL MATRIX D |
|
006 |
42,26,13 |
f RESULT C |
|
007 |
10 |
÷ |
|
008 |
42,26,12 |
f RESULT B |
|
009 |
42,16, 6 |
f MATRIX 6 |
|
010 |
45,16,14 |
RCL MATRIX D |
|
011 |
10 |
÷ |
|
012 |
45,16,13 |
RCL MATRIX C |
|
013 |
40 |
+ |
|
014 |
43 32 |
g RTN |
|