matlab yapıyor bunu, mldivide diye bir komutla. matrisleri \ operatörüyle bölüyor fakat arkasında uzuuun bir matematik açıklaması var. normalde x'i bulmak için kullansak da aynı mantık ile K da bulunur gibi geldi.
A\B is the matrix division of A into B, which is roughly the
same as INV(A)*B , except it is computed in a different way.
If A is an N-by-N matrix and B is a column vector with N
components, or a matrix with several such columns, then
X = A\B is the solution to the equation A*X = B. A warning
message is printed if A is badly scaled or nearly singular.
A\EYE(SIZE(A)) produces the inverse of A.
If A is an M-by-N matrix with M < or > N and B is a column
vector with M components, or a matrix with several such columns,
then X = A\B is the solution in the least squares sense to the
under- or overdetermined system of equations A*X = B. The
effective rank, K, of A is determined from the QR decomposition
with pivoting. A solution X is computed which has at most K
nonzero components per column. If K < N this will usually not
be the same solution as PINV(A)*B. A\EYE(SIZE(A)) produces a
generalized inverse of A.
C = MLDIVIDE(A,B) is called for the syntax 'A \ B' when A or B is an
object.
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