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Hi ,

I have exactly the same problem of Maria (his question is after my text)...I think that the answer for this topic will allow to help me also in my problem. Has somebody a solution to compute The Fourier's transform of a function depending on three spatial variable (x,y,z) in one direction only (for example the direction z) ?

Here the old topic posted by Maria :

Thank you for your help.

Antony

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Hello everybody,

We try since one week to perform Fourier's transform of a spatial-function along the direction "z" only.
We mean, we have a function f(x,y,z) first performed by COMSOL (it is the solution of a PDE...) depending on the spatial variables x, y, z. We would like to obtain Fourier's transform of this function only along the z-direction [i.e. f(x,y,z)-------TF------> f(x,y,q) = \int_{-infinity}^{+infinity} f(x,y,z)*exp(q*z) dz ].

- COMSOL can perform this calculation ? I think that I have to draw a new axis "z" (to perform this integration) but really I do not know how draw this axis from - infinity to + infinity !!
- Have you some solutions to perform this calculation ? Unfortunately this problem is not treated in COMSOL's book.

Thank you for your help !

Maria and Nils

P.S. This discussion has been already posted by Nils two days ago but no answer has been given...
Thus, I restarted the discussion now hoping an answer this time...