# troubles with mne.io.read\_raw\_brainvision **URL:** \ **Category:** Mailing List Archive (read-only)\ **Tags:** list-archive\ **Created:** [May 24, 2017, 10:10am UTC](https://mne.discourse.group/t/troubles-with-mne-io-read-raw-brainvision/1224 "2017-05-24T10:10:10Z")\ **Posts on this page:** 5\ **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:** [May 24, 2017, 10:10am UTC](https://mne.discourse.group/t/troubles-with-mne-io-read-raw-brainvision/1224/1 "2017-05-24T10:10:10Z")
Hello,I am using mne.io.read\_raw\_brainvision to read bipolar EMG and EKG data saved as brainvision files (vhdr). I have 4 channels: EMGleft,EMGright,EKG and STI 014 with the triggers. However, when I import the data in MNE python, the first three channels are not correctly imported.They all look like a combination of EMG data, however they do not correspond to the original data, particularly even the third channel is not at all EKG. You can see attached to the email the images with a portion of imported data from the three channels. Is it possible that the function is using a reference by default? I don't see this option in the function.This is how I am using the function: emg = mne.io.read\_raw\_brainvision(emgFname,montage=None, misc='auto',scale=1.0,preload=True, verbose=True) I don't get any error. But the data are not correctly imported. Any ideas? Many thanks,Stefania Stefania Ficarella, Ph.D.Laboratoire de Neurosciences Cognitives (LNC)Centre National de la Recherche Scientifique (CNRS)Aix-Marseille Universit?Site Saint Charles3, Place Victor Hugo13331 Marseille (France) -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20170524/56686f44/attachment-0001.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20170524/56686f44/attachment-0001.html) -------------- next part -------------- A non-text attachment was scrubbed... Name: EMGright.png Type: image/png Size: 15205 bytes Desc: not available Url : [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20170524/56686f44/attachment-0003.png](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20170524/56686f44/attachment-0003.png) -------------- next part -------------- A non-text attachment was scrubbed... Name: EMGleft.png Type: image/png Size: 13468 bytes Desc: not available Url : [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20170524/56686f44/attachment-0004.png](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20170524/56686f44/attachment-0004.png) -------------- next part -------------- A non-text attachment was scrubbed... Name: EKG.png Type: image/png Size: 15697 bytes Desc: not available Url : [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20170524/56686f44/attachment-0005.png](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20170524/56686f44/attachment-0005.png) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [May 24, 2017, 10:37am UTC](https://mne.discourse.group/t/troubles-with-mne-io-read-raw-brainvision/1224/2 "2017-05-24T10:37:43Z")
hi Stefania, can you share the file? thanks Alex ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [May 24, 2017, 2:06pm UTC](https://mne.discourse.group/t/troubles-with-mne-io-read-raw-brainvision/1224/3 "2017-05-24T14:06:54Z")
Hello, Just an update on Stefania comments. Investigating the issue, it appears that mne.io.read\_raw\_brainvision is currently not using the information about data orientation in the header (.vhdr) file: DataOrientation=VECTORIZED Apparently, the function assumes that data are multiplexed. It's just a matter of transposing the matrix while reading. I'll try to pinpoint the lines in mne.io.read\_raw\_brainvision where this should be done.      Best,          B. ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [May 24, 2017, 2:12pm UTC](https://mne.discourse.group/t/troubles-with-mne-io-read-raw-brainvision/1224/4 "2017-05-24T14:12:12Z")
Excellent, thanks for investigating. Can you open a GitHub issue or PR and we can iterate there? ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [May 25, 2017, 7:45am UTC](https://mne.discourse.group/t/troubles-with-mne-io-read-raw-brainvision/1224/5 "2017-05-25T07:45:47Z")
hi, to follow up I created the issue: [https://github.com/mne-tools/mne-python/issues/4283](https://github.com/mne-tools/mne-python/issues/4283) Alex