matrix exponential

Nov 13, 2014 at 7:14 AM
how can i get the exponential from a matrix - cant find the function. how can i build it
Coordinator
Nov 14, 2014 at 10:17 AM
You are referring to this function? We do not support it out of the box yet, but we certainly want to have it in the future as it has a few very useful use cases.
Nov 14, 2014 at 11:05 AM
Hello cdrnet - yes this is the Function i want to use...
Now i have build it for my owen

Thank you for replay
Jan 14, 2015 at 9:41 PM
Hello,

I'm working on the same. Fitting and exponential.
I still cannot found any solution (for free). Did you make any progress?

Regards,
Jaroslav
Jan 15, 2015 at 5:56 AM

Hello Jaroslav

I have found an easy way

Algorithmus:

E = expm(A)

Situation: A R4×4

tol := 0.001

Identity Matrix E, I R4×4

k = 1

repeat

I := A I/k

E := E + I

k := k + 1

until E < tol

Return: E

Von: jaroslavmencl [email removed]
Gesendet: Mittwoch, 14. Januar 2015 22:42
An: [email removed]
Betreff: Re: matrix exponential [mathnetnumerics:571946]

From: jaroslavmencl

Hello,

I'm working on the same. Fitting and exponential.
I still cannot found any solution (for free). Did you make any progress?

Regards,
Jaroslav