Does IDL have, or has anyone written, a matrix exponential function
similar to the matlab expm()
On Thu, 5 Nov 2009 12:20:47 -0800 (PST), Dave L <firstname.lastname@example.org>
>Does IDL have, or has anyone written, a matrix exponential function
>similar to the matlab expm()
It seems you can do this by calculating eigenvectors and eigenvalues.
Look in the help ...Request Fortran code for Matrix exponential for a real matrix, with accuracy estimate
I was looking for an open source Fortran code to compute Matrix
exponential for a real matrix, with accuracy estimate, something like
http://www.slicot.org/shared/doc/MB05OD.html. I tried to search Scilab
but was not successful.
Thanks for any hint.
On 11/12/2011 2:41 PM, Zhu Wang wrote:
> I was looking for an open source Fortran code to compute Matrix
> exponential for a real matrix, with accuracy estimate, something like
> http://www.slicot.org/shared/doc/MB05OD.html. I tried to search Scilab
> but was not successful.
> Thanks for any hint....Exponential Matrix integration
Let B be a nonsingular nxn matrix. I want to integrate the function:
f(t) from 0 to T, where f(t)=exp(Bt)*exp(Bt)'. Can somebody help me?
is t symbolic, or numerical?
In article <jlhee8z4ftbh@legacy>,
email@example.com (Julio) writes:
>Let B be a nonsingular nxn matrix. I want to integrate the function:
>f(t) from 0 to T, where f(t)=exp(Bt)*exp(Bt)'. Can somebody help me?
If B is diagonalizable then
B=T*\Lambda*inv(T) with \Lambda the diagonal matrix of the eigenvalues
exp(Bt) = T*diag(...MATRIX LOGARITHM (and EXPONENTIAL)
Just a quick question. Does IDL have a similar command to the popular
MATLAB logm and expm so that I can take the matrix logarithm (and
exponential)? I understand that ALOG and EXP will not function in this
On Jan 27, 7:41=A0pm, teddyallen <teddyal...@yahoo.com> wrote:
> Just a quick question. Does IDL have a similar command to the popular
> MATLAB logm and expm so that I can take the matrix logarithm (and
> exponential)? I understand that ALOG and EXP will not function in this
Can you explain what matrix log and exp are?
On Ja...Fast Matrix Exponential
I was wondering if anyone out there knows a fast alternative to the matrix exponential function expm. Perhaps there is a mex file out there somewhere? The matrix I am considering does not have any special form, except that all its entries are real numbers. I have considered the expokit package, but was wondering if there is anything faster out there.
Thank you very much,
"Raul " <firstname.lastname@example.org> wrote in message <email@example.com>...
> Hi All,
> I was wondering if anyone out there knows a fast alternat...Symbolic matrix exponentiation
I am attempting to calculate the general form of an equation using symbolic math in the example below. This example, as shown, runs quickly and the result has already been very useful to me.
I am hoping to extend this example to the generalized case. If I allow one more parameter to be free, for example by removing a = 1, then calculating the expm never finishes. The problem goes from being solved in a few seconds to not completing within days.
Ideally I would like to allow all parameters to be free, including a, c, d, and f. Is there a trick that will make this exponentiat...Matrix exponentiation in FORTRAN
I hope I've come to the right place - please redirect me if there's a
more appropriate forum to be asking these questions.
I am trying to figure out how to compute the exponential of a matrix
in FORTRAN - something similar to expm used in MATLAB, and MatrixExp
in Mathematica. I've gone through LAPACK's online documentation but
couldn't find an answer. Is there some way of getting this done? I'd
appreciate your kind help with this.
As if by magic, Maayan appeared !
> I hope I've come to the right place - please redirect me if...exponential of matrix in fortran90
I'm looking for a subroutine for fortran90 that could compute
exponential of a matrix?
Is there any subroutine?
I read "Nineteen Dubious Ways to Compute the Exponential of a
Matrix",but I don't know which way is better?
could you help me?
In article <firstname.lastname@example.org>,
>I'm looking for a subroutine for fortran90 that could compute
>exponential of a matrix?
>Is there any subroutine?
>I read "Nineteen Dubious Ways to Compute the Exp...Matrix Exponential in Labview
Anybody know how to compute a 'Matrix Exponential' in labview? Either
in the base package or an add-on toolkit. For a an explanation of the
matrix exponential, see:
Which the only reference I can find on the web site.
Thanks, Ian Wall
I quickly looked at the document and I do not think you compute the
It appears to be an identity. It just says that a matrix to some
power can be expressed as an infinite sum. You can use the two
interchangably in your calculations. For ...