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102 lines (77 sloc) 1.81 KB
%define values for E,F,G
e3 = [3;4];
f3 = [1;4;5];
g3 = [2;7];
%Call lu_tridiag
[ud3,uo3,lo3] = lu_tridiag(e3,f3,g3);
b3 = ones(3,1);
%Call solve_tridiag
x3 = solve_tridiag(ud3,uo3,lo3,b3);
x3_2 = (A3*3) \ b3;
error3 = x3 - x3_2;
normErr(3) = norm(err_3);
e4 = [1;1;3];
f4 = [2;2;5;8];
g4 = [4;5;6];
[ud4,uo4,lo4] = lu_tridiag(e4,f4,g4);
b4 = ones(4,1);
x4 = solve_tridiag(ud4,uo4,lo4,b4);
x4_2 = (A4*4) \ b4;
err_4 = x4 - x4_2;
normErr(4) = norm(err_4);
e5 = [3;4;4;4];
f5 = [1;2;4;4;9];
g5 = [1;3;3;9];
[ud5,uo5,lo5] = lu_tridiag(e5,f5,g5);
b5 = ones(5,1);
x5 = solve_tridiag(ud5,uo5,lo5,b5);
x5_2 = (A5*5) \ b5;
err_5 = x5 - x5_2;
normErr(5) = norm(err_5);
e6 = [1;3;4;5;6];
f6 = [2;2;7;7;9;10];
g6 = [3;4;5;9;9];
[ud6,uo6,lo6] = lu_tridiag(e6,f6,g6);
b6 = ones(6,1);
x6 = solve_tridiag(ud6,uo6,lo6,b6);
x6_2 = (A6*6) \ b6;
err_6 = x6 - x6_2;
normErr(6) = norm(err_6);
e7 = [1;1;2;4;4;5];
f7 = [3;3;5;8;8;9;9];
g7 = [2;2;4;4;6;7];
[ud7,uo7,lo7] = lu_tridiag(e7,f7,g7);
b7 = ones(7,1);
x7 = solve_tridiag(ud7,uo7,lo7,b7);
x7_2 = (A7*7) \ b7;
err_7 = x7 - x7_2;
normErr(7) = norm(err_7);
e8 = [1;1;2;2;2;3;5];
f8 = [1;2;4;6;6;9;10;10];
g8 = [2;4;6;7;8;9;9];
[ud8,uo8,lo8] = lu_tridiag(e8,f8,g8);
b8 = ones(8,1);
x8 = solve_tridiag(ud8,uo8,lo8,b8);
x8_2 = (A8*5) \ b8;
err_8 = x8 - x8_2;
normErr(8) = norm(err_8);
e9 = [1;1;2;3;3;4;4;6];
f9 = [2;3;3;4;5;8;8;9;10];
g9 = [1;2;2;4;5;5;7;9];
[ud9,uo9,lo9] = lu_tridiag(e9,f9,g9);
b9 = ones(9,1);
x9 = solve_tridiag(ud9,uo9,lo9,b9);
x9_2 = (A9*9) \ b9;
err_9 = x9 - x9_2;
normErr(9) = norm(err_9);
e10 = [1;1;2;2;3;4;5;6;6];
f10 = [1;2;2;3;4;5;6;8;8;9];
g10 = [1;3;4;6;7;7;7;8;9];
[ud10,uo10,lo10] = lu_tridiag(e10,f10,g10);
b10 = ones(10,1);
x10 = solve_tridiag(ud10,uo10,lo10,b10);
x10_2 = (A10*10) \ b10;
err_10 = x10 - x10_2;
normErr(10) = norm(err_10);
%Print error values
normErr'