In 2004 Martyn Plummer said that functionality was available in packages msm (as MatrixExp) and Lindsey's rmutils (as mexp)

David Firth also offered:
http://www2.warwick.ac.uk/fac/sci/statistics/staff/academic/firth/software/mexp

--
David Winsemius


On Nov 11, 2008, at 5:20 PM, Terry Therneau wrote:

Is the matrix exponential available in some package?

The cannonical reference is "Nineteen dubious ways to take the exponential of a matrix". (Love that title)

        Terry T.

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