[FieldTrip] 回复：SV: user's question about ft_freqstatistics

[郭策2021220122]

What's the function of the 2 variable named  outline *** in the lay struct for EEG TD and TF cluster based permutation？ And how does the data in the two variables correlate to the functions of cluster based permutation？

To perform a cluster based permutation on tf data,  I adapted a lay struct for my own analysis, which has 63 electrodes, from one made by my colleague, which then has 62 electrodes.  I changed the labels and orders of the electrodes,  calculated and added one positions,  reordered the positions  and added one row respectively in the weight and height.  However it still reported errors.  So is there something wrong with the outline variables？



---- 回复的原邮件 ----
| 发件人 | mikkelcv at drcmr.dk |
| 日期 | 2024年02月29日 21:42 |
| 收件人 | FieldTrip discussion list<fieldtrip at science.ru.nl> |
| 抄送至 | 郭策2021220122<guoce_bisu_212 at 163.com> |
| 主题 | SV: [FieldTrip] user's question about ft_freqstatistics |

Dear 郭策

 

If you want to do a cluster-based permutation test on the full sensor array, you need to define the layout of the electrodes for the test to know which electrodes are close to one another for the clustering. This will indeed vary from layout to layout. FieldTrip comes with templates for many standard layouts from different EEG cap manufacturers. If you use your own cap layout (or one not in FieldTrip), you need to create the “neighbours” structure first before you can do the cluster-based test. You can read more on this tutorial: https://www.fieldtriptoolbox.org/example/neighbours/

 

Best regards

Mikkel

 

Fra: fieldtrip <fieldtrip-bounces at science.ru.nl> på vegne af 郭策2021220122 via fieldtrip <fieldtrip at science.ru.nl>
Dato: torsdag, 29. februar 2024 kl. 14.31
Til: fieldtrip at science.ru.nl <fieldtrip at science.ru.nl>
Cc: 郭策2021220122 <guoce_bisu_212 at 163.com>
Emne: [FieldTrip] user's question about ft_freqstatistics

To whom it may concern,

 

When conducting cluster based permutation of ERP time-frequency data using fielrdtrip function "ft_freqstatistics",

a mat file containing a variable which then contains infomation of positions of electrodes is required. 

How could this file (or, this kind of files, based on different EEG caps) accessed online?

Also, how should this file be changed if data of some electrodes are removed (not interpolated)?

 

Many thanks
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