Message-ID: <400D5273.60408@lancaster.ac.uk>
Date: 2004-01-20T16:08:19Z
From: Barry Rowlingson
Subject: matrix exponential: M^0
In-Reply-To: <1074616806.2958.46.camel@monkey>
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