[pymvpa] >what does 405X 42696 in the dataset mean?

[Yune Lee]

aha,
it looks like dataset only shows a certain set of samples out of 925 after
running feature_selection classifier.
If I just run the first loading part, I can see the intact 925 rows, but
after running it, it only shows 405 column.
Thanks a lot for helping me out, Michael and Yaroslav.

Thanks,



On Mon, Dec 29, 2008 at 11:53 AM, Yune Lee <life1994 at gmail.com> wrote:

> Hi,Yaroslav
> That's a good point. I have no idea either.
> Enclosed is the output by typing data dataset.summary()
>
> Thanks,
> YSL
>
>
>
> On Mon, Dec 29, 2008 at 11:39 AM, Yaroslav Halchenko <
> debian at onerussian.com> wrote:
>
>> so bold file does have 925 volumes,
>> thus NiftiDataset I bet has also 925 samples after you load it
>>
>> we can only wonder where 925-405=420 volumes got lost ;)
>>
>> my guess could be you did some samples selection by the labels?
>> smth like
>>
>> ds['labels', [1,2,3]]
>>
>> ?
>>
>> if not -- then just run and post output for
>>
>> attr = SampleAttributes('post_AvB_onsets.txt')
>> dataset = NiftiDataset(samples='wrbold_25jun08MG.nii.gz',
>>  labels=attr.labels, chunks=attr.chunks, mask='mask_25jun08MG.nii.gz')
>> print dataset.summary()
>>
>> It Must have 925 samples ;-)
>>
>> On Mon, 29 Dec 2008, Yune Lee wrote:
>>
>> >    Many thanks for letting me know that the firt two lines are
>> redundent.
>>
>> >    I'll later on just type from mvpa.suite import * only.
>>
>> >    Any way, enclosed is the output.
>>
>> --
>> Yaroslav Halchenko
>> Research Assistant, Psychology Department, Rutgers-Newark
>> Student  Ph.D. @ CS Dept. NJIT
>> Office: (973) 353-1412 | FWD: 82823 | Fax: (973) 353-1171
>>        101 Warren Str, Smith Hall, Rm 4-105, Newark NJ 07102
>> WWW:     http://www.linkedin.com/in/yarik
>>
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>
>
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