Hi
looks to me like some of he input files have very different dynamic
range - is that possible?
hth
christian
On 14 Feb 2008, at 10:49, Steven Scholte wrote:
> Dear Steve,
>
> This plot is from higher-level temporal concatentation, but tensor-ICA
> gives more or less the same EVplot.
>
> Steven
>
> -----Original Message-----
> From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On
> Behalf Of Steve Smith
> Sent: donderdag 14 februari 2008 9:39
> To: [log in to unmask]
> Subject: Re: [FSL] strange Group ICA dimensional estimate
>
> Hi - which ICA option were you running - higher-level temporal
> concatentation or tensor ICA?
> This does indeed look strange....
> Cheers, Steve.
>
>
> On 8 Feb 2008, at 08:02, H.Steven Scholte wrote:
>
>> Dear FSL experts,
>>
>> I have used MELODIC for PICA analysis on a between&within subject
>> design.
>> All seems to work great but the resulting EVplot (see attachment)
>> worries
>> me. Instead of getting a clear peak in the 'dim. explained' i get a
>> funny
>> line. Also, the eigenvalues drop dramatically after 5 components and
>> do not
>> show the characteristic curve. As you can see the dataset is rather
>> large
>> (121 runs of 400 volumes).
>>
>> Does the attached image look OK or is there something strange going
>> on?
>>
>> Steven
>>
>> <EVplot.png>
>
>
> ------------------------------------------------------------------------
> ---
> Stephen M. Smith, Professor of Biomedical Engineering
> Associate Director, Oxford University FMRIB Centre
>
> FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
> +44 (0) 1865 222726 (fax 222717)
> [log in to unmask] http://www.fmrib.ox.ac.uk/~steve
> ------------------------------------------------------------------------
> ---
|