MATLAB: How to find a complement minor in a matrix

complement minor

how to find a complement minor in a matrix

Best Answer

Just apply the det() command to the appropriate sub-matrix, e.g.,

A=rand(4);
compMinor = det( A([1,3,4],[1,2,4]) )

The setdiff() command might also be helpful in finding the appropriate sub-matrix indices.

Related Solutions

MATLAB: One’s and two’s complement

a='11001011';
c1=not(a-'0')   % one's complement
d=1;
for k=numel(a):-1:1
  r=d & c1(k);
  c2(1,k)=xor(d,c1(k));  % c2 is two's complement
  d=r;
end
[c1;c2]

MATLAB: How should I find the Cholesky factorization of the gramian in MATLAB

The command GRAM calculates the Cholesky factorization of the gramian directly from a Cholesky Lyapunov solver. If there is no specified factorization, GRAM explicitly forms the product Wo = R' * R. In other words,

q = gram(SYS, 'o');

is equivalent to:

r = gram(SYS, 'of');
q = r' * r;

To calculate the Cholesky factorization of the gramian,

rq = gram(SYS, 'of');

should be used. Using:

q = gram(SYS, 'o');
rq = chol(q);

may cause round-off errors and scaling issues. This is so because it performs the product q = r' * r first in the call to GRAM and then refactorizes the product q using CHOL.

Best Answer

Related Solutions

MATLAB: One’s and two’s complement

MATLAB: How should I find the Cholesky factorization of the gramian in MATLAB

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