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<div class="moz-cite-prefix">Le 10/10/2018 à 12:39, <a
class="moz-txt-link-abbreviated" href="mailto:amonmayr@laas.fr">amonmayr@laas.fr</a>
a écrit :<br>
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<blockquote cite="mid:98348825-4536-9821-b612-010ae7a0495f@laas.fr"
type="cite">Le 10/10/2018 à 08:47, Samuel Gougeon a écrit : <br>
<blockquote type="cite">Le 09/10/2018 à 21:52, antoine monmayrant
a écrit : <br>
<blockquote type="cite">Hello Samuel, <br>
<br>
Sorry I might not have made myself clear: fft and fftshift
provide the ability to perform transform along only one of the
dimensions of a multidimensional array. <br>
Something like S(x,y,z) --[FFT along 3rd dim]-->
ffthift(ffft(S(x,y,z), -1,3),3)=Ŝ(x,y,kz). <br>
In that case, you need to perform fft and eventually fftshift
along only the dimension of the transform. <br>
ifftshift should also provide the same possibility to perform
the inverse transform: Ŝ(x,y,kz) --[IFFT along 3rd dim]-->
iffthift(ffft(Ŝ(x,y,kz), +1,3),3)=S(x,y,z). <br>
<br>
This is a basic signal processing requirement in my field. <br>
</blockquote>
<br>
Hello Antoine, <br>
<br>
Yes, you are right: in case of directional FFT and odd number of
elements along the chosen direction, ifftshift can't presently
be used. <br>
Could you please post the same remark on bugzilla? This bug/wish
is not yet reported. <br>
</blockquote>
Done: <a class="moz-txt-link-freetext"
href="http://bugzilla.scilab.org/show_bug.cgi?id=15799">http://bugzilla.scilab.org/show_bug.cgi?id=15799</a>
<br>
</blockquote>
<br>
This complementary feature is now implemented and <a
href="https://codereview.scilab.org/20573">proposed for Scilab
6.0.2 there</a>.<br>
<br>
BR<br>
Samuel<br>
<br>
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