VERY Confusing Notation in FFT Documentation

David Doria — Wed, 02 Apr 2008 21:35:04 -0400

Under "Definition", the notation

X=fft(x) and x=ifft(X)

is used.

Then under "Description", Y=fft(X) is used! If you skip
that very first line in "Description" and read the rest of
the description using the definition in "Definition",
nothing makes sense!! It is talking about "X is padded with
zeros" which seems like the TRANSFORM is padded (according
to X=fft(x)) when really the INPUT is padded (Y=fft(X)).

I think this notation should be standardized for the next
release!

Just my $.02.

-Dave

Re: VERY Confusing Notation in FFT Documentation

ImageAnalyst — Thu, 03 Apr 2008 00:49:49 -0400

On Apr 2, 5:35=A0pm, "David Doria" <daviddo...@gmail.com> wrote:
> Under "Definition", the notation
>
> X=3Dfft(x) and x=3Difft(X)
>
> is used.
>
> Then under "Description", Y=3Dfft(X) is used! =A0If you skip
> that very first line in "Description" and read the rest of
> the description using the definition in "Definition",
> nothing makes sense!! It is talking about "X is padded with
> zeros" which seems like the TRANSFORM is padded (according
> to X=3Dfft(x)) when really the INPUT is padded (Y=3Dfft(X)).
>
> I think this notation should be standardized for the next
> release!
>
> Just my $.02.
>
> -Dave
---------------------------------------------------------------
Dave:
Yes -- sloppy, ambiguous, and inconsistent wording is rampant in their
documentation. I agree with you. When I find it, I email it off to
support@themathworks.com (or whatever it is). They look over my
comment and say they'll review it for the next version. Let them know
about this one. What version were you referring to? R2008a?
Regards,
ImageAnalyst

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VERY Confusing Notation in FFT Documentation

Re: VERY Confusing Notation in FFT Documentation