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<TITLE>FFTN N-Dimensional Forward FFT
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<H2>FFTN N-Dimensional Forward FFT
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Section: <A HREF=sec_transforms.html> Transforms/Decompositions </A>
<H3>Usage</H3>
Computes the DFT of an N-dimensional numerical array along all
dimensions. The general syntax for its use is
<PRE>
y = fftn(x)
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which computes the same-size FFTs for each dimension of <code>x</code>.
Alternately, you can specify the size vector
<PRE>
y = fftn(x,dims)
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where <code>dims</code> is a vector of sizes. The array <code>x</code> is zero padded
or truncated as necessary in each dimension so that the output
is of size <code>dims</code>. The <code>fftn</code> function is implemented by a sequence
of calls to <code>fft</code>.
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