Dear list,
I understand that to raise matrix A to power (-1/2) we should use something
like this:
eigen(A)$vectors%*%diag(1/sqrt(eigen(A)$values))%*%t(eigen(A)$vectors)
[from previous discussions:
http://r.789695.n4.nabble.com/matrix-power-td900335.html]
But this will only do it for negative
On Sun, Mar 11, 2012 at 1:46 AM, Ebrahim Jahanshiri
e.jahansh...@gmail.com wrote:
Dear list,
I understand that to raise matrix A to power (-1/2) we should use something
like this:
eigen(A)$vectors%*%diag(1/sqrt(eigen(A)$values))%*%t(eigen(A)$vectors)
[from previous discussions:
On Sun, Mar 11, 2012 at 8:56 AM, Peter Langfelder
peter.langfel...@gmail.com wrote:
On Sun, Mar 11, 2012 at 1:46 AM, Ebrahim Jahanshiri
e.jahansh...@gmail.com wrote:
Dear list,
I understand that to raise matrix A to power (-1/2) we should use something
like this:
If my memory is correct, the archives of this list contains
several discussions of round off error problems associated with
different methods for computing things like this. The Matrix package
(part of the base distribution) contains a function expm, whose help
file says, The expm
On 11-03-2012, at 17:52, Spencer Graves wrote:
If my memory is correct, the archives of this list contains several
discussions of round off error problems associated with different methods for
computing things like this. The Matrix package (part of the base
distribution) contains a
On 11-03-2012, at 18:18, Berend Hasselman wrote:
On 11-03-2012, at 17:52, Spencer Graves wrote:
If my memory is correct, the archives of this list contains several
discussions of round off error problems associated with different methods
for computing things like this. The Matrix
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