How can I calculate P

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Matthew Cao
Matthew Cao 2020-2-16
评论： Walter Roberson 2020-2-16
Hi, below is the function where I need to solve P, but when I used the code below, it gave me the wrong P. Is there any way I can modify this?
function [L, U, P] = lu_pp(A)
n = length(A);
U = zeros(n,n);
L = zeros(n,n);
P = zeros(n,n);
for k = 1:n
U(k,k)= A(k,k);
for i = k+1:n
L(i,k) = A(i,k)./U(k,k);
U(k,i) = A(k,i);
end
for i = k+1:n
for j = k+1:n
A(i,j) = A(i,j)-L(i,k)*U(k,j);
end
end
end
P = L*U*inv(A);
end
  1 个评论
Walter Roberson
Walter Roberson 2020-2-16
No documentation about what the input is, or what the output is expected to be, so we as outsiders have to guess that your code defines what it is intended to do, and that therefore your code is perfect the way it is.

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