Re: Inverse Laplace transform?

[Doug Stewart]

Joe Koski wrote:
> on 12/10/06 10:36 AM, Doug Stewart at address@hidden wrote:
>
>   
> > Is there an inverse Laplace transform function in Octave?
> > Doug Stewart
> >     
>
> Doug,
>
> Check ifft at http://octave.sourceforge.net/index/index.html, or help ifft
> at the octave prompt.
>
> Joe
>
>   
Thanks Joe
I did look there and there is nothing for Inverse Laplace transform that 
I can see.


I have written up a crude version that is not ready for prime time yet. 
I thought I would ask before I spent the time to reinvent the wheel :-)

What I have is a function ( for the controls tool box) that takes in a 
sys type transfer function.
It then uses the residue function to do the partial fraction 
expansion.From this I form up a string  that is the time representation 
of each factor.  What I am having a little difficulty with is how to 
get  the string formatted nicely.

I have a cell array with each location holding a string that is the time 
representation of a term.
What I want to do  is take  these and form them into one long string 
that has all the "+"'s and "-"'s between each term properly formated.

So any help would be appreciated.

resultstring = cell(1,1)  "+" cell(2,1) "-" cell(3,1)

is what I can't seem to do?

Thanks in advance for any help.

Doug Stewart