Your data file shoud be ending with extention .set. the following link is tutorial for loading data in EEGLAB: https://sccn.ucsd.edu/wiki/Chapter_01:_Loading_Data_in_EEGLAB

hi Vamsi Krishna

eeglab accept number of files extention, for me i work with (*.edf  and  *.set) files.

regards

Atef

but I have data in .eeg files, how can I convert data into the .set format

Hello,

With EEGlab, you may work with many file types as you can see in the figure. But only problem is that the file have to be recorded in the said devices (i guess) other wise it may not work. 

we have data recorded by Nihon Kohden instrument, it's in .EEG format. But when importing data files, it doesn't accept.

Dear Vamsi,

Perhaps you have previously convert your data in a compatible (general) format (.edf).

Which kind of error do you have?

Best,

Francisco

You can find more information on compatibility in the table listed here: https://sccn.ucsd.edu/wiki/A01:_Importing_Continuous_Epoched_Data 

Now I'm able to load data in to EEGLAB as a .mat variable. It need to convert the EEG channel data into columns. Still we can plot the spectral plots of this data, but there are issues with plotting ICA components on scalp map. EEGLAB requires channel location file to plot the components. Default compatible data formats have inbuilt channel location information, but the data entering as a matlab file don't have any information. I overcome this problem of channel locations by creating the coordinate info(chan_locs.xyz) file. After I attached this location file with .mat file. Finally I'm able to plot the channel of EEG.

@ Vamsi Krishna I see you have the same problem that I have in my lab. I am running Nihon Kohden 9200 for EEG acquisition and it gives us .EEG file that is not acceptable by eeglab. If your chan_locs.xyz file works, than it is a matter of interest to me. Did you make this file manually? then how? And how do you attach this fiile with .mat file? How did you convert your eeg file to mat file in the first place?

Strangely, EEGLAB doesnt read even the edf/bdf files that are converted from .eeg files (created by NK) using EDF browser.

I prepared the locs file manually by entering the coordinates of all 16-electrodes as text file.

For that look at the picture i attached in my last update in this question.

Dear Jay Prakash

If the problem still persist I have several solution that you may want to try.

1. Install Nihon Kohden plugin at https://sccn.ucsd.edu/wiki/EEGLAB_Extensions

Extract > copy and paste the files (3 of them) in 'plugin' folder

type and run 'eeglab' in matlab command window

under File > Import data > Using EEGLAB funtions plugins, you can now see 'From Nihon Koden .m00 text files' (im assuming u already know how to convert .eeg file to .m00 extension)

2. Like you already said, convert .eeg to .edf file using EDFbrowser.

To do this EDFbrowser require several files in addition to .eeg file (such as .21e file which contain channel information from Nihon Kohden)

To do this you needs to install Biosig plugin from the same website mention above.

The way to install this plugin is somewhat different compare to how we install Nihon Kohden's plugin. Please spend some time to read biosig_installer.m' for how to install the plugin.

Either way both solution works for me.

Hope this help