# question **URL:** \ **Category:** Mailing List Archive (read-only)\ **Tags:** list-archive\ **Created:** [July 20, 2016, 9:42am UTC](https://mne.discourse.group/t/question/1049 "2016-07-20T09:42:43Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [July 20, 2016, 9:42am UTC](https://mne.discourse.group/t/question/1049/1 "2016-07-20T09:42:43Z")
Hallo, I am trying to do a ICA analysis on my data. I am currently searching for the right montage for the approximate locations of my electrodes. I have a EasycapM23 - Large Equidistant 32-Channel-Arrangement: at which montage does it correspond in mne? Many thanks Emanuela -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20160720/e71bfe94/attachment-0001.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20160720/e71bfe94/attachment-0001.html) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [July 20, 2016, 8:47pm UTC](https://mne.discourse.group/t/question/1049/2 "2016-07-20T20:47:32Z")
hi, you should be able to make use of the easycapM23.mat provided by fieldtrip. Let us know if you have troubles using this file with MNE. HTH Alex ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [July 25, 2016, 3:09pm UTC](https://mne.discourse.group/t/question/1049/3 "2016-07-25T15:09:21Z")
Hi, I am having some troubles to use this file with mne. This is what I have written: montage=mne.channels.read\_montage('easycapM23',ch\_names=channel\_names, path="/Users/Emanuela1/Desktop/easycapM23.mat", unit='cm') it gives me back an error I suppose due to file extension. What should I do? Thanks Emanuela -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20160725/cca0232b/attachment.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20160725/cca0232b/attachment.html) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [July 25, 2016, 8:33pm UTC](https://mne.discourse.group/t/question/1049/4 "2016-07-25T20:33:58Z")
hi, you need to read the mat file and produce a txt file such as this one: [https://github.com/mne-tools/mne-python/blob/master/mne/channels/data/montages/easycap-M10.txt](https://github.com/mne-tools/mne-python/blob/master/mne/channels/data/montages/easycap-M10.txt) call it easycap-M23.txt and then you should be able to read provided you set the good path. HTH Alex ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [July 26, 2016, 2:21pm UTC](https://mne.discourse.group/t/question/1049/5 "2016-07-26T14:21:36Z")
Hi again, since with the mat file it was more complicated that I imagine, I created now a text file which contains the number of the channel, theta and phi (here attached). When I run this: montage=mne.channels.read\_montage('easycapM23',ch\_names=channel\_names, path="/Users/Emanuela1/Desktop/ICA/easycapM23.txt", unit='cm', transform=False) I get always this error: OSError: [Errno 20] Not a directory: '/Users/Emanuela1/Desktop/ICA/easycapM23.txt' But I actually could upload other text files from the same folder for other purposes. why do I have this problem? Many thanks, Emanuela > hi, > > you need to read the mat file and produce a txt file such as this one: > > [https://github.com/mne-tools/mne-python/blob/master/mne/channels/data/montages/easycap-M10.txt](https://github.com/mne-tools/mne-python/blob/master/mne/channels/data/montages/easycap-M10.txt) > > call it easycap-M23.txt > > and then you should be able to read provided you set the good path. > > HTH > Alex > > \> > \>\> > \>\> easycapM23.mat > \> > \> > \> Hi, > \> > \> I am having some troubles to use this file with mne. This is what I have > \> written: > \> > \> montage=mne.channels.read\_montage('easycapM23',ch\_names=channel\_names, > \> path="/Users/Emanuela1/Desktop/easycapM23.mat", unit='cm') > \> > \> it gives me back an error I suppose due to file extension. What should I > do? > \> > \> Thanks > \> Emanuela > \> > \> > \> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > \> Mne\_analysis mailing list > \> Mne\_analysis at nmr.mgh.harvard.edu > \> [Mne\_analysis Info Page](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis) > \> > \> > \> The information in this e-mail is intended only for the person to whom > it is > \> addressed. If you believe this e-mail was sent to you in error and the > \> e-mail > \> contains patient information, please contact the Partners Compliance > \> HelpLine at > \> [MyComplianceReport.com: Compliance and Ethics Reporting](http://www.partners.org/complianceline) . If the e-mail was sent to you > in > \> error > \> but does not contain patient information, please contact the sender and > \> properly > \> dispose of the e-mail. > \> > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > Mne\_analysis mailing list > Mne\_analysis at nmr.mgh.harvard.edu > [Mne\_analysis Info Page](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis) -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20160726/a5ba623e/attachment.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20160726/a5ba623e/attachment.html) -------------- next part -------------- Name Theta Phi 1 -90 -72 2 90 72 3 -90 -36 4 -60 -51 5 45 90 6 60 51 7 90 36 8 -69 -21 9 -31 -46 10 31 46 11 69 21 12 -90 0 13 -45 0 14 0 0 15 45 0 16 90 0 17 -113 18 18 -69 21 19 -31 46 20 31 -46 21 69 -21 22 113 -18 23 -90 36 24 -60 51 25 -45 -90 26 60 -51 27 90 -36 28 -113 54 29 -90 72 30 90 90 31 90 -72 32 113 -54 ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [July 26, 2016, 2:25pm UTC](https://mne.discourse.group/t/question/1049/6 "2016-07-26T14:25:18Z")
I just downloaded your file and did this: import mne channel\_names = None montage = mne.channels.read\_montage('easycapM23',     ch\_names=channel\_names,     path="/Users/alex/Downloads", unit='cm') it worked. try montage=mne.channels.read\_montage('easycapM23',ch\_names=channel\_names, path="/Users/Emanuela1/Desktop/ICA/", unit='cm', transform=False) after checking that easycapM23.txt is in folder /Users/Emanuela1/Desktop/ICA/ HTH A ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 9, 2016, 6:33pm UTC](https://mne.discourse.group/t/question/1049/7 "2016-08-09T18:33:54Z")
Hello, I can't figure out where the error is in the following code: montage = mne.channels.read\_montage('standard\_1020', ch\_names=['F3','F4']) info = mne.create\_info(['F3','F4'], 512, ch\_types=['eeg','eeg'], montage=montage) This gives me "No EEG channels found." but I don't really know what to do with this. Without the montage specification in create\_info there is no error. Nico -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20160809/9114c70d/attachment.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20160809/9114c70d/attachment.html) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 9, 2016, 6:40pm UTC](https://mne.discourse.group/t/question/1049/8 "2016-08-09T18:40:46Z")
Hi Nico, Those lines work fine for me. What version of mne are you using? Mainak ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 9, 2016, 7:00pm UTC](https://mne.discourse.group/t/question/1049/9 "2016-08-09T19:00:26Z")
I remember I used those same lines before and they worked. I guess then I maybe changed something either in channels.py, montage.py or in the standard\_1020.elc file. Is there a way to restore these files? How do I find out which version of MNE I use? Thanks Nico Quoting Mainak Jas \: ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 9, 2016, 7:03pm UTC](https://mne.discourse.group/t/question/1049/10 "2016-08-09T19:03:08Z")
What do you get when you do: > > > import mne > > > mne.\_\_version\_\_ > > > mne.\_\_path\_\_ If you are using the development workflow, you can go to the mne-python folder and do $ git stash which should undo any edits you may have done. Mainak ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 9, 2016, 7:27pm UTC](https://mne.discourse.group/t/question/1049/11 "2016-08-09T19:27:01Z")
0.12.0 was the version I used. I used git clone to use the development version. Now mne.\_\_version\_\_ shows me '0.13.dev0' as the version that is in use. However I still get the "No EEG channels found." error message. ☹ Quoting Mainak Jas \: ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 10, 2016, 12:15pm UTC](https://mne.discourse.group/t/question/1049/12 "2016-08-10T12:15:56Z")
Can you post the output of `mne.sys_info()`? Mainak ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 10, 2016, 12:33pm UTC](https://mne.discourse.group/t/question/1049/13 "2016-08-10T12:33:16Z")
This is the output: Platform: Windows-10-10.0.10586-SP0 Python: 3.5.1 |Anaconda 4.0.0 (64-bit)| (default, Jun 15 2016, 15:29:36) [MSC v.1900 64 bit (AMD64)] Executable: C:\Users\Nico\Anaconda3\python.exe mne: 0.13.dev0 numpy: 1.10.4 {blas=mkl\_core\_dll, lapack=mkl\_lapack95\_lp64} scipy: 0.17.1 matplotlib: 1.5.1 sklearn: 0.17.1 nibabel: Not found nitime: Not found mayavi: Not found nose: 1.3.7 pandas: 0.18.0 pycuda: Not found skcuda: Not found Quoting Mainak Jas \: ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 10, 2016, 1:02pm UTC](https://mne.discourse.group/t/question/1049/14 "2016-08-10T13:02:56Z")
these lines do work also for me. are you sure it's just these 2 lines? if yes, try removing mne-python from your system and reinstalling it. Best, ALex ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [August 10, 2016, 3:28pm UTC](https://mne.discourse.group/t/question/1049/15 "2016-08-10T15:28:42Z")
Now it works for me. Not really shure what has changed... I did not remove mne-python but I did restart my computer in between I believe. Quoting Alexandre Gramfort \: