[Mne_analysis] Questions on the metric units of source space

[Feng Liu]

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Dear MNE user,

I am trying to figure out the metric unit used in src[0]['rr'],
src[1]['rr'] and the actual brain size.
I thought the coordinate is in meter and trying to convert to cm with
the following code:

np.max(src[0]['rr'],,axis=0)*100
Out[15]: array([ 0.07051213,  1.91847401,  5.94898962])
np.min(src[0]['rr'],,axis=0)*100
Out[16]: array([-1.99681995, -3.02844139,  2.67239889])
np.max(src[1]['rr'],,axis=0)*100
Out[17]: array([ 2.0684692 ,  1.85747988,  5.92515851])
np.min(src[1]['rr'],,axis=0)*100
Out[18]: array([ 0.00727971, -3.00631614,  2.51376613])

If the unit is in meter, I will get a very tiny brain.
Any suggestion on this question will be much appreciated. Thanks for your time.

Best,
Feng Liu