[FieldTrip] ft_singleplotTFR seems broken

[Casper van Heck]

Dear Eelke,

I was busy with some other stuff, and just now revisited the analysis. Even
with a newer version of Fieldtrip, this is still happening, and I still do
not know why...
Have you had time to take a look at it?

Sincerely,

Casper


On Thu, Sep 26, 2013 at 12:43 PM, Casper van Heck
<caspervanheck at gmail.com>wrote:

> Dear Eelke,
>
> I've put up an exerpt of my code, with the data from a single subject
> (no.10, 9MB) in a separate folder here<https://www.dropbox.com/sh/nr4s0yu4voh5w3l/6XvAvmaMdk>
> .
> It also includes a screenshot of what I see with when I run the code with
> this exact dataset, and a small program 'filehandler', which I've been to
> lazy to replace.
>
> Note that this specific subject only has about 60 seconds of data (and I'm
> still waiting for the student to tell me why).
>
> I'm hoping you'll get the same result as the screenshot, and you'll be
> able to tell me why...
>
> Best regards,
>
> Casper
>
>
> On Wed, Sep 18, 2013 at 1:25 PM, Eelke Spaak <eelke.spaak at donders.ru.nl>wrote:
>
>> Dear Casper,
>>
>> Could you maybe post a snippet online somewhere (e.g. dropbox) of data
>> corresponding to this plot (i.e. the output of ft_freqanalysis that
>> you input to ft_singleplotTFR, assuming that it's averaged over trials
>> and therefore small)? Then we can see whether this is reproducable on
>> our systems.
>>
>> Best,
>> Eelke
>>
>> On 16 September 2013 17:12, Casper van Heck <caspervanheck at gmail.com>
>> wrote:
>> > Dear Fieldtrippers,
>> >
>> > I've been doing some exploratory plotting of a dataset where several
>> > subjects were exposed to a continuous stimulus (CPM) over the course of
>> > three minutes. One of the things that was asked was a time-frequency
>> plot,
>> > over those three minutes. While I'm not quite sure a TFR can be used on
>> that
>> > scale without problems, I went ahead with it just to see what Fieldtrip
>> > would do. What I got, was this:
>> > http://tinypic.com/r/zx2tqs/5|
>> > And I have no idea what went wrong (note that this specific subject
>> only got
>> > a 60s stimulus). Quality of the picture and the validity of the analysis
>> > aside, I have a severe problem with the axes, which seem to be all over
>> the
>> > place.
>> >
>> > I simply read the data using ft_preprocessing (no filters or anything,
>> since
>> > the student in charge already used a 10Hz high-pass and a 150Hz low-pass
>> > filter).
>> > The only field in 'cfg' is 'headerfile'.
>> >
>> > Next, I call ft_freqanalysis with:
>> >     cfg.output = 'pow';
>> >     cfg.method = 'wavelet'; % default; Morlet wavelet
>> >     cfg.taper = 'hanning';
>> >     cfg.tapsmofrq = 4;
>> >     cfg.channel = 'Cz';
>> >     cfg.foi = [20:0.5:30];
>> >     cfg.t_ftimwin = ones(length(cfg.foi),1).*0.25;
>> >     cfg.toi = 0:0.5:60;
>> >
>> > And finally, I end up with the monstrocity shown earlier. This problem
>> only
>> > presents itself with Fieldtrip-related functions, the normal
>> Matlab-plots
>> > work as well as they've ever done, so I'm thinking it's something in
>> > Fieldtrip that's causing this.
>> >
>> > My hope is that someone has encountered this problem before, and knows
>> how
>> > to solve it...
>> >
>> > Sincerely,
>> >
>> > Casper
>> >
>> >
>> > _______________________________________________
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>> > fieldtrip at donders.ru.nl
>> > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
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>
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