[R] matrix "Adjoint" function

[Reid Huntsinger]

Sometimes the term "adjoint matrix" refers to the "matrix of cofactors", 
that is, the matrix of signed determinants of n-1 x n-1 dimensional 
submatrices. This is just the inverse multiplied by the determinant. As 
with both the inverse and determinant, if this is part of a larger 
computation there are often better ways to solve the problem avoiding 
explicit computation of determinants or inverses.

Reid Huntsinger

Peter Dalgaard wrote:

>"Jessica M. Maia" <jmmaia at unity.ncsu.edu> writes:
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>>Hi there,
>>
>>I'm new to R and despite searching today, I can't
>>find a function which will compute the adjoint of
>>a matrix A. Does this adjoint function exist in R?
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>I don't think so, but the adjoint matrix is also known as the
>conjugate transpose and we do have t() and Conj(). (If your matrix is
>real, t() will do.)
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