you can use EEGLAB toolbox. visit this link : 

http://sccn.ucsd.edu/eeglab/index.html

or you can use EEG data exist on www.physionet.org

if you have the input co ordinate values , you obviously can but to have the input values you must have a hardware interface.  

Hi Mr. Titi, This is very nice article where that all computations were done with MATLAB, including those for PSD, PSF, PCA, histograms and the Hilbert transform regarding EEG signals:

.http://sulcus.berkeley.edu/freemanwww/manuscripts/V4.p4/05.html

I recommand to see this article too, please:

http://www.cs.bris.ac.uk/~rafal/phasereset/

See the following websites:

http://www.mathworks.com/company/newsletters/articles/eeg-data-processing-and-classification-with-gbsanalyze-under-matlab.html

http://sccn.ucsd.edu/eeglab/whatiseeg.html

http://cognitrn.psych.indiana.edu/busey/temp/eeglabtutorial4.301/

thank you

Use the following databases:

http://www.physionet.org/physiobank/database