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# Untitled

a guest Mar 29th, 2020 80 Never
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1. A = [1,2,1,-3,2; 3,7,5,-7,10; -2,-2,3,13,0; -1,2,5,6,24; 4,10,9,-4,13];
2. b = [-8; -24; 9; 28; -35];
3.
4. A = [A b];
5.
6. U1 = [A b];
7.
8. #zamiana 1 i 5 wiersza
9. U1([5 1], :) = U1([1 5], :);
10.
11. #zerowanie kolumny 1
12. U1(2, :) = U1(2, :) - (U1(2, 1) / U1(1, 1))*U1(1, :);
13. U1(3, :) = U1(3, :) - (U1(3, 1) / U1(1, 1))*U1(1, :);
14. U1(4, :) = U1(4, :) - (U1(4, 1) / U1(1, 1))*U1(1, :);
15. U1(5, :) = U1(5, :) - (U1(5, 1) / U1(1, 1))*U1(1, :);
16.
17. #wartość maksymalna w 2 kolumnie (od wartości bezwzględnej)
18. maks = max(abs(U1(2:5, 2)));
19. #zamiana 2 i 4 wiersza
20. U1([2 4], :) = U1([4 2], :);
21.
22. #zerowanie 2 kolumny:
23. U1(3, :) = U1(3, :) - (U1(3, 2) / U1(2, 2))*U1(2, :);
24. U1(4, :) = U1(4, :) - (U1(4, 2) / U1(2, 2))*U1(2, :);
25. U1(5, :) = U1(5, :) - (U1(5, 2) / U1(2, 2))*U1(2, :);
26.
27. #wartość maksymalna w 3 kolumnie (od wartości bezwzględnej)
28. maks = max(abs(U1(3:5, 3)));
29. #zerowanie kolumny
30. U1(4, :) = U1(4, :) - (U1(4, 3) / U1(3, 3))*U1(3, :);
31. U1(5, :) = U1(5, :) - (U1(5, 3) / U1(3, 3))*U1(3, :);
32.
33. #wartość maksymalna w 4 kolumnie (od wartości bezwzględnej)
34. maks = max(abs(U1(4:5, 4)));
35. #zerowanie 4 kolumny:
36. U1(5, :) = U1(5, :) - (U1(5, 4) / U1(4, 4))*U1(4, :);
37.
38. b1 = U1(:, 6);
39.
40. #majac macierz wspolczynnikow, mozna znalexc macierz L1
41. #deklaracja macierzy jednostkowej
42. L1 = eye(5, 5);
43.
44. ##A1 = [1  2  1 -3  2
45. ##      3  7  5 -7 10
46. ##     -2 -2  3 13  0
47. ##     -1  2  5  6 24
48. ##      4 10  9 -4 13];
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