[R] matrix exponential: M^0
Barry Rowlingson
B.Rowlingson at lancaster.ac.uk
Tue Jan 20 17:08:19 CET 2004
Federico Calboli wrote:
> Dear All,
>
> I would like to ask why the zeroeth power of a matrix gives me a matrix
> of ones rather than the identity matrix:
>
Because ^0 gives you the zero-th power of the _elements_ of the
matrix, not the matrix itself. A matrix of 0^0 is all 1s.
Similary, '*' multiplies the elements together, it doesn't do matrix
multiplication. For that you need %*%.
There is no %^% operator for matrix exponentials.
Baz
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