[Eeglablist] load EGI files

[Govindan, Rathinaswamy]

Dear all:
Thanks every one for all the suggestions. Here I address your questions; also post my questions related to your suggestions.

Srini: Our sampling rate is 1KHz. I can down sample the data to 250Hz or even lower however I am worried that it might affect the gamma band activity that we are interested in.

Andrew: I am using IMAC to import the data. I am running 32bit MATLAB in it. It has 16GB of RAM. I was suggested by EGI techs to insert event in the file and use segmentation option to segment the data based on the events. After I segmented the data, I used the convert to mat format function that came with EGI software.  I could not able to import these mat files in MATLAB.

Simon: I will also try your suggestion. How would I check if it has exported the right set of electrode layout?

Iman: Are you running EP Toolbox on Windows PC or on Linux/Unix/MAC. I am trying to understand if I need to install this in a computer running on 64bit processor.

Ramon and Alois: Does the biosig4matlab tool have to be installed on a Linux system? Can it work on IMAC in which a 32 bit MATLAB is installed?

I am going to try out the following:

Install EP Toolbox and check if it helps.

Install Biosig4matlab tool and check if it helps.

I will keep you posted on the status.

Thanks, again.

Best regards,

RB


R. B. Govindan, PhD
Staff Scientist III
Director of Advanced Physiologic Signals Processing Lab
Fetal Medicine Institute
Division of Fetal and Transitional Medicine
Children's National Health System
111 Michigan Ave, NW, M3118C
Washington, DC
202-476-5309
We stand for children.
________________________________
From: Ramón Martinez [nucleuscub at gmail.com]
Sent: Thursday, September 11, 2014 3:28 PM
To: Govindan, Rathinaswamy; EEGLAB List
Subject: Re: [Eeglablist] load EGI files

Hi Govindan,
1- From the EEGLAB side,  yes, you can import EGI files using pop_readegi.m, but for a big file, should be better to use the Biosig plugin for EEGLAB (you can try both)
You'll find the Biosig plugin in the EEGLAB extension manger:

 File -> Manage EEGLAB extesions -> Data import extensions

After checking out the plugin,  you can try pop_biosig.m,  or from the GUI

File -> Using the Biosig interface

2- Other memory issues can arise from the PC-MATLAB side. Check this link to have an idea.
http://www.mathworks.com/matlabcentral/answers/91711-what-is-the-maximum-matrix-size-for-each-platform<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.mathworks.com_matlabcentral_answers_91711-2Dwhat-2Dis-2Dthe-2Dmaximum-2Dmatrix-2Dsize-2Dfor-2Deach-2Dplatform&d=AAMFaQ&c=Zoipt4Nmcnjorr_6TBHi1A&r=4JR34R10jj9uXt37C2EM4uXHWYJdQA42rymb5F0yfJY&m=GsEjw4m_8nx3fkAo7zDVR3Ol0zIb_5r_viVtSqbdjfU&s=CLVXtTG8nc_AkBkZXfMXanIdrUgDQWrFccevCjNUTzA&e=>

Hope this helps,
 Ramon

On Thu, Sep 11, 2014 at 11:44 AM, Govindan, Rathinaswamy <rgovinda at childrensnational.org<mailto:rgovinda at childrensnational.org>> wrote:
Dear List:
This RB Govindan from Children's Hospital, Washington, DC. We have EEG recorded from premature infants using HD EEG system. Some of our recordings last for more than 2 hours. We would like to export the data to MATLAB and process them in MATLAB. The software that came with the HD EEG system is not allowing us to convert our huge files (>2GB) into mat format. Would like to know if there are tools available in EEGLAB or some similar to export the data to MATLAB environment?

Thank you very much in anticipation.

Best regards,

RB Govindan

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--
_____________________________________________________
Ramon Martinez-Cancino
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego

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