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<div>Hi all,</div>
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<div> I have a very large Raw file (several hours sampled at 25 kHz) and the analysis depends on not decimating the data. I have been trying to use a memory-mapped file but when I add channels, I get the error:</div>
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>>> raw.add_channels([Cz], force_update_info=False)<br>
Traceback (most recent call last):<br>
File "<stdin>", line 1, in <module><br>
File "/autofs/space/karima_001/users/alex/software/anaconda2/lib/python2.7/site-packages/mne/channels/channels.py", line 877, in add_channels<br>
data = np.concatenate(data, axis=con_axis)<br>
MemoryError</div>
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<div> If anyone has helpful information about a way around this, I would appreciate it greatly.</div>
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<div>Thanks,</div>
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<div>Alex Rockhill<br>
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<div class="PlainText">Translational NeuroEngineering Laboratory<br>
Division of Neurotherapeutics, Department of Psychiatry<br>
Massachusetts General Hospital, Martinos Center<br>
149 13th St Charlestown #2301, Boston, MA 02129</div>
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