def cohere_pairs_eeg( eeg, newLength, NFFT, offset, eoiPairs=None, indMin=0, indMax=None,
data=None, returnPxx=False, **kwargs):
"""
FUNC: cohere_pairs_eeg
DESCR: Cxy, Phase, freqs = cohere_pairs_eeg( ...)
Compute the coherence for all pairs in the eoi. eeg is a
EEG instance.
eoiPairs is a list of electrode tuples; if none, use all. Each
tuple is a pair of electrodes, eg,
eoiPairs = [ ( ('MT',7), ('MT',8) ),
( ('MT',7), ('MT',9) ),
....
]
indMin, indmax if provided, give the sample number indices into
eeg.data to do the coherence over (default all)
if data is not None, use data rather than eeg.data to compute
coherence
The other function arguments, except for 'preferSpeedOverMemory'
(see below), are explained in the help string of 'psd'.
Return value is a tuple (Cxy, Phase, freqs).
Cxy -- a dictionary of electrode tuples -> coherence vector for that
pair.
Phase -- a dictionary of phases of the cross spectral density at
each frequency for each pair. keys are (e1,e2).
freqs -- a vector of frequencies, equal in length to either the
coherence or phase vectors for any electrode key. Eg, to make
a coherence
Bode plot:
e1 = ('MT', 7)
e2 = ('MT', 8)
subplot(211)
plot( freqs, Cxy[(e1,e2)])
subplot(212)
plot( freqs, Phase[(e1,e2)])
For a large number of pairs, cohere_pairs can be much more
efficient than just calling cohere for each pair, because it
caches most of the intensive computations. If N is the number of
pairs, this function is O(N) for most of the heavy lifting,
whereas calling cohere for each pair is O(N^2). However, because
of the caching, it is also more memory intensive, making 2
additional complex arrays with approximately the same number of
elements as X.
See mlab cohere_pairs for optional kwargs
See test/cohere_pairs_test.py in the src tree for an example
script that shows that this cohere_pairs and cohere give the same
results for a given pair.
"""
print "utils.cohere_pairs_eeg: eeg.freq: ", eeg.freq
amp = eeg.get_amp()
print "UTILS AMP: ", amp
if eoiPairs is None:
eoiPairs = all_pairs_eoi( amp.to_eoi() )
m = amp.get_electrode_to_indices_dict()
ij = [ (m[e1], m[e2]) for e1, e2 in eoiPairs]
ij.sort()
print len(ij), len(eoiPairs)
if data is None: data = eeg.data
#print "cohere_pairs_eeg: data.shape is ", data.shape
if indMax is None: indMax = data.shape[0]
X = data[indMin:indMax]
if returnPxx:
try:
Cxy, Phase, freqs, Pxx = cohere_pairs(
X, ij, newLength, NFFT, offset, Fs=eeg.freq, returnPxx=True, **kwargs)
except OverflowError, overflowerror:
print "cohere_pairs_eeg(): caught overflow error!! bailing: ", overflowerror
if data is None: data = eeg.data
#print "cohere_pairs_eeg: data.shape is ", data.shape
if indMax is None: indMax = data.shape[0]
X = data[indMin:indMax]
if returnPxx:
try:
Cxy, Phase, freqs, Pxx = cohere_pairs(
X, ij, newLength, NFFT, offset, Fs=eeg.freq, returnPxx=True, **kwargs)
except OverflowError, overflowerror:
print "cohere_pairs_eeg(): caught overflow error!! bailing: ", overflowerror
else:
Cxy, Phase, freqs = cohere_pairs(
X, ij, newLength, NFFT, offset, Fs=eeg.freq, **kwargs)
seen = {}
keys = Cxy.keys()
keys.sort()
assert(len(ij)==len(eoiPairs))
for keyIJ, keyEOI in zip(ij, eoiPairs):
Cxy[keyEOI] = Cxy[keyIJ]
del Cxy[keyIJ]
Phase[keyEOI] = Phase[keyIJ]
del Phase[keyIJ]
i,j = keyIJ
e1, e2 = keyEOI
Cxy, Phase, freqs, Pxx = cohere_pairs(X,
ij,
newLength,
NFFT,
offset,
Fs=eeg.freq,
returnPxx=True,
**kwargs)
except OverflowError, overflowerror:
print "cohere_pairs_eeg(): caught overflow error!! bailing: ", overflowerror
else:
Cxy, Phase, freqs = cohere_pairs(X,
ij,
newLength,
NFFT,
offset,
Fs=eeg.freq,
**kwargs)
seen = {}
keys = Cxy.keys()
keys.sort()
assert (len(ij) == len(eoiPairs))
for keyIJ, keyEOI in zip(ij, eoiPairs):
Cxy[keyEOI] = Cxy[keyIJ]
del Cxy[keyIJ]
Phase[keyEOI] = Phase[keyIJ]
del Phase[keyIJ]
def cohere_pairs_eeg(eeg,
newLength,
NFFT,
offset,
eoiPairs=None,
indMin=0,
indMax=None,
data=None,
returnPxx=False,
**kwargs):
"""
FUNC: cohere_pairs_eeg
DESCR: Cxy, Phase, freqs = cohere_pairs_eeg( ...)
Compute the coherence for all pairs in the eoi. eeg is a
EEG instance.
eoiPairs is a list of electrode tuples; if none, use all. Each
tuple is a pair of electrodes, eg,
eoiPairs = [ ( ('MT',7), ('MT',8) ),
( ('MT',7), ('MT',9) ),
....
]
indMin, indmax if provided, give the sample number indices into
eeg.data to do the coherence over (default all)
if data is not None, use data rather than eeg.data to compute
coherence
The other function arguments, except for 'preferSpeedOverMemory'
(see below), are explained in the help string of 'psd'.
Return value is a tuple (Cxy, Phase, freqs).
Cxy -- a dictionary of electrode tuples -> coherence vector for that
pair.
Phase -- a dictionary of phases of the cross spectral density at
each frequency for each pair. keys are (e1,e2).
freqs -- a vector of frequencies, equal in length to either the
coherence or phase vectors for any electrode key. Eg, to make
a coherence
Bode plot:
e1 = ('MT', 7)
e2 = ('MT', 8)
subplot(211)
plot( freqs, Cxy[(e1,e2)])
subplot(212)
plot( freqs, Phase[(e1,e2)])
For a large number of pairs, cohere_pairs can be much more
efficient than just calling cohere for each pair, because it
caches most of the intensive computations. If N is the number of
pairs, this function is O(N) for most of the heavy lifting,
whereas calling cohere for each pair is O(N^2). However, because
of the caching, it is also more memory intensive, making 2
additional complex arrays with approximately the same number of
elements as X.
See mlab cohere_pairs for optional kwargs
See test/cohere_pairs_test.py in the src tree for an example
script that shows that this cohere_pairs and cohere give the same
results for a given pair.
"""
print("utils.cohere_pairs_eeg: eeg.freq: ", eeg.freq)
amp = eeg.get_amp()
print("UTILS AMP: ", amp)
if eoiPairs is None:
eoiPairs = all_pairs_eoi(amp.to_eoi())
m = amp.get_electrode_to_indices_dict()
ij = [(m[e1], m[e2]) for e1, e2 in eoiPairs]
ij.sort()
print(len(ij), len(eoiPairs))
if data is None: data = eeg.data
#print "cohere_pairs_eeg: data.shape is ", data.shape
if indMax is None: indMax = data.shape[0]
X = data[indMin:indMax]
if returnPxx:
try:
Cxy, Phase, freqs, Pxx = cohere_pairs(X,
ij,
newLength,
NFFT,
offset,
Fs=eeg.freq,
returnPxx=True,
**kwargs)
except OverflowError as overflowerror:
print("cohere_pairs_eeg(): caught overflow error!! bailing: ",
overflowerror)
else:
Cxy, Phase, freqs = cohere_pairs(X,
ij,
newLength,
NFFT,
offset,
Fs=eeg.freq,
**kwargs)
seen = {}
keys = list(Cxy.keys())
keys.sort()
assert (len(ij) == len(eoiPairs))
for keyIJ, keyEOI in zip(ij, eoiPairs):
Cxy[keyEOI] = Cxy[keyIJ]
del Cxy[keyIJ]
Phase[keyEOI] = Phase[keyIJ]
del Phase[keyIJ]
i, j = keyIJ
e1, e2 = keyEOI
seen[i] = e1
seen[j] = e2
#print Cxy
#print Phase, "&*&*&"
#print freqs
if returnPxx:
for i, ei in list(seen.items()):
Pxx[ei] = Pxx[i]
del Pxx[i]
if returnPxx:
return Cxy, Phase, freqs, Pxx
else:
return Cxy, Phase, freqs
def cohere_pairs_eeg( eeg, newLength, NFFT, offset, eoiPairs=None, indMin=0, indMax=None,
data=None, returnPxx=False, calc_type='coherence', shape=None,**kwargs):
"""
FUNC: cohere_pairs_eeg
DESCR: Cxy, Phase, freqs = cohere_pairs_eeg( ...)
Compute the coherence for all pairs in the eoi. eeg is a
EEG instance.
eoiPairs is a list of electrode tuples; if none, use all. Each
tuple is a pair of electrodes, eg,
eoiPairs = [ ( ('MT',7), ('MT',8) ),
( ('MT',7), ('MT',9) ),
....
]
indMin, indmax if provided, give the sample number indices into
eeg.data to do the coherence over (default all)
if data is not None, use data rather than eeg.data to compute
coherence
The other function arguments, except for 'preferSpeedOverMemory'
(see below), are explained in the help string of 'psd'.
Return value is a tuple (Cxy, Phase, freqs).
Cxy -- a dictionary of electrode tuples -> coherence vector for that
pair.
Phase -- a dictionary of phases of the cross spectral density at
each frequency for each pair. keys are (e1,e2).
freqs -- a vector of frequencies, equal in length to either the
coherence or phase vectors for any electrode key. Eg, to make
a coherence
Bode plot:
e1 = ('MT', 7)
e2 = ('MT', 8)
subplot(211)
plot( freqs, Cxy[(e1,e2)])
subplot(212)
plot( freqs, Phase[(e1,e2)])
For a large number of pairs, cohere_pairs can be much more
efficient than just calling cohere for each pair, because it
caches most of the intensive computations. If N is the number of
pairs, this function is O(N) for most of the heavy lifting,
whereas calling cohere for each pair is O(N^2). However, because
of the caching, it is also more memory intensive, making 2
additional complex arrays with approximately the same number of
elements as X.
See mlab cohere_pairs for optional kwargs
See test/cohere_pairs_test.py in the src tree for an example
script that shows that this cohere_pairs and cohere give the same
results for a given pair.
"""
print "utils.cohere_pairs_eeg: eeg.freq: ", eeg.freq
amp = eeg.get_amp()
#print "UTILS AMP: ", amp
if eoiPairs is None:
eoiPairs = all_pairs_eoi( amp.to_eoi() )
offset = int(offset)
print "COHERE_PAIRS_EEG: int offset: ", offset
m = amp.get_electrode_to_indices_dict()
ij = [ (m[e1], m[e2]) for e1, e2 in eoiPairs]
ij.sort()
print "COHERE_PAIRS EEG PAIRS LENGTH: ", len(ij), len(eoiPairs)
if data is None: data = eeg.data
#print "cohere_pairs_eeg: data.shape is ", data.shape
All = {}
if indMax is None: indMax = data.shape[0]
X = data[indMin:indMax]
if calc_type == 'ddtf':
Cxy, Phase, freqs = granger.ddtf_test(X, ij, newLength, NFFT, offset, Fs=eeg.freq,progressCallback=donothing_callback,calc_type=calc_type,shape=shape)
elif calc_type == 'correlation':
Cxy, Phase, freqs = granger.ddtf_test(X, ij, newLength, NFFT, offset, Fs=eeg.freq,progressCallback=donothing_callback,calc_type=calc_type,shape=shape)
else:
if returnPxx:
try:
Cxy, Phase, freqs, Pxx = cohere_pairs(
X, ij, newLength, NFFT, offset, Fs=eeg.freq, returnPxx=True, **kwargs)
except OverflowError, overflowerror:
print "cohere_pairs_eeg(): caught overflow error!! bailing: ", overflowerror
else: