Meg Power Spectrum

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#!/usr/bin/env python
# python
 
# Copyright 2008 Dan Collins
 
# This is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
 
# And is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
 
# You should have received a copy of the GNU General Public License
# along with Build; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
from pylab import *
from msiread import getposted
 
pdf = getposted.read()
dt = 1/pdf.sample_rate
t = arange(0,pdf.n_slices,dt)
t = arange(0,pdf.n_slices/pdf.sample_rate, dt)
 
def calc(data):
 
    subplot(311)
    plot(t,data)
    subplot(312)
    psd(data, 512, 1/dt)
    subplot(313)
    specgram(data, 512, 1/dt)
 
    show()
 
if __name__ == "__main__":
    data= pdf.GetSliceRangeMEGChannels(0, pdf.n_slices)
    data=data[1,:]
    calc(data)

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http://server.neuromeg.org/pymeg/

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