[FieldTrip] Error with mutual information

[Gian Marco Duma]

Xavier, thanks for your quick reply. I solved the installation problem,
however I have two more questions. I'm not sure how to compute mutual
information with the ft_connectivityanalysis function, since I did not find
mutual information within the methods section of the function.
The second question is: my data are basically  resting state source
activity I extracted from brainstorm with the dimensions 15002 (vertices) x
2000 (time). In the mutualinformation function says 'The input data should
be a Nchan x Nobservations matrix'. However, when I try tu
run ft_connectivity_mutualinformation I receive the following error:

Error using entropy
Too many input arguments.

Error in information (line 501)
  [H{:}] = entropy(R, opts, outputOptsList{:});

Error in ft_connectivity_mutualinformation (line 156)
          output(k,p,m) = information(R2, opts, 'I'); % this computes
mutual information

What am I doing wrong?
Thanks

Il giorno gio 18 feb 2021 alle ore 03:13 Xavier Vrijdag <
x.vrijdag at auckland.ac.nz> ha scritto:

> HI Gian,
>
>
>
> I am using the mutual information analysis provided by the IBTB toolbox in
> fieldtrip.
>
>
>
> You can check in the fieldtrip/external/ folder if the IBTB folder exists.
> In my fieldtrip downloads the IBTB toolbox is available. Otherwise you can
> download it from the fieldtrip github:
> https://github.com/fieldtrip/fieldtrip/tree/master/external/ibtb
>
>
>
> In general, I can recommend you to use the ft_connectivityanalysis
> function instead of the lower-level function
> ft_connectivity_mutualinformation.
>
>
>
> Regards,
>
>
>
> Xavier
>
>
>
> *From: *fieldtrip <fieldtrip-bounces at science.ru.nl> on behalf of Gian
> Marco Duma <gianmarco.duma at unipd.it>
> *Reply to: *FieldTrip discussion list <fieldtrip at science.ru.nl>
> *Date: *Thursday, 18 February 2021 at 12:14 PM
> *To: *"fieldtrip at science.ru.nl" <fieldtrip at science.ru.nl>
> *Subject: *[FieldTrip] Error with mutual information
>
>
>
> Hi everyone, I'm trying to run mutual information as a measure of
> functional connectivity. When I run the
> command  ft_connectivity_mutualinformation I receive the following message
>
>
>
> Error using ft_hastoolbox (line 450)
> the IBTB toolbox is not installed, see http://www.ibtb.org
>
> Error in ft_connectivity_mutualinformation (line 48)
> ft_hastoolbox('ibtb', 1);
>
>
>
> The web site reported in the error line is not active anymore. Therefore I
> downloaded the ibtb toolbox from the supplementary material of the paper
> Magri et al. 2009, at the following link
>
> https://link.springer.com/article/10.1186/1471-2202-10-81
>
>
>
> I installed as usual the toolbox, I decompressed it and I added it to the
> matlab path as suggested by the installation file. However I continue to
> receive the same error message.
>
> Do you have any suggestions?
>
> Thanks
>
>
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> https://doi.org/10.1371/journal.pcbi.1002202
>
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