Hello,
I think this is because the code works in complete blocks (but I'd have to
chase it through to confirm). Is your block size the number of points in
that dimension? (It would be odd if it is, but it could be.) Otherwise
perhaps I can take a look at your spectrum (it's only 2D so presumably not
large). I tried to do this on a 2D here and it worked ok (so did go up to
the next block size, but that was not the number of points). (Mind you,
my peak wasn't showing up in the correct position, so that's another
issue! But you didn't have that problem.)
Wayne
On Wed, 8 Oct 2008, Justin Douglas wrote:
> Hi Wayne,
>
> I have an aliased peak in a 1H-15N HSQC. If I unalias it, then (of
> course) analysis creates a "virtual" spectrum above the Nyquist
> frequency that shows me where my peak "really" is. It took me a
> while, but I've decided that this is a really great feature. The
> problem is that in V2, when I unalias this peak, instead of just
> showing me this peak at the "correct" frequency AND the other peaks
> that have 15N chemical shifts near this peak as aliased peaks, it get
> a whole 2nd copy of my spectrum downfield from my Nyquist frequency.
> This is a bit distracting.
>
> I've attached a screenshot to help clarify. I have marked the aliased
> peak at its "correct" frequency. Notice that the Maximum aliased
> frequency is 132.510 ppm, which is just what we expect. Also you can
> easily see the duplicate spectrum below the true spectrum.
>
> Thanks
>
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