def plotEEGPower(self, channel=0):
"""
Plots LFP power
Parameters
----------
channel : int
The channel from which to plot the power
See Also
-----
ephysiopy.common.ephys_generic.EEGCalcsGeneric.plotPowerSpectrum()
"""
from ephysiopy.common.ephys_generic import EEGCalcsGeneric
if self.rawData is None:
print("Loading raw data...")
self.load(loadraw=True)
from scipy import signal
n_samples = np.shape(self.rawData[:, channel])[0]
s = signal.resample(self.rawData[:, channel],
int(n_samples / 3e4) * 500)
E = EEGCalcsGeneric(s, 500)
power_res = E.calcEEGPowerSpectrum()
ax = self.makePowerSpectrum(
power_res[0],
power_res[1],
power_res[2],
power_res[3],
power_res[4],
)
plt.show()
return ax
def plotEEGPower(self, eeg_type="eeg", **kwargs):
from ephysiopy.common.ephys_generic import EEGCalcsGeneric
if "eeg" in eeg_type:
E = EEGCalcsGeneric(self.EEG.sig, self.EEG.sample_rate)
elif "egf" in eeg_type:
E = EEGCalcsGeneric(self.EGF.sig, self.EGF.sample_rate)
power_res = E.calcEEGPowerSpectrum()
ax = self.makePowerSpectrum(
power_res[0],
power_res[1],
power_res[2],
power_res[3],
power_res[4],
**kwargs
)
plot = True
if "plot" in kwargs:
plot = kwargs.pop("plot")
if plot:
plt.show()
return ax
def plotSpectrogramByDepth(self,
nchannels=384,
nseconds=100,
maxFreq=125,
**kwargs):
"""
Plots a heat map spectrogram of the LFP for each channel.
Line plots of power per frequency band and power on a subset
of channels are also displayed to the right and above the main plot.
Parameters
----------
nchannels : int
The number of channels on the probe
nseconds : int, optional
How long in seconds from the start of the trial to do the
spectrogram for (for speed).
Default 100
maxFreq : int
The maximum frequency in Hz to plot the spectrogram out to.
Maximum 1250.
Default 125
kwargs: legal values are: 'frequencies' and 'channels'; both are lists
that denote which frequencies to show the mean power of
along the length of the probe and,
which channels to show the frequency spectra of.
Notes
-----
Should also allow kwargs to specify exactly which channels and / or
frequency bands to do the line plots for
"""
import os
lfp_file = os.path.join(self.path2LFPdata, "continuous.dat")
status = os.stat(lfp_file)
nsamples = int(status.st_size / 2 / nchannels)
mmap = np.memmap(lfp_file,
np.int16,
"r",
0, (nchannels, nsamples),
order="F")
# Load the channel map
# Assumes this is in the AP data location and that kilosort was run
# channel_map = np.squeeze(np.load(os.path.join(
# self.path2APdata, 'channel_map.npy')))
channel_map = np.arange(nchannels)
lfp_sample_rate = 2500
data = np.array(mmap[channel_map, 0:nseconds * lfp_sample_rate])
from ephysiopy.common.ephys_generic import EEGCalcsGeneric
E = EEGCalcsGeneric(data[0, :], lfp_sample_rate)
E.calcEEGPowerSpectrum()
# Select a subset of the full amount of data to display later
spec_data = np.zeros(shape=(data.shape[0], len(E.sm_power[0::50])))
for chan in range(data.shape[0]):
E = EEGCalcsGeneric(data[chan, :], lfp_sample_rate)
E.calcEEGPowerSpectrum()
spec_data[chan, :] = E.sm_power[0::50]
x, y = np.meshgrid(E.freqs[0::50], channel_map)
import matplotlib.colors as colors
from matplotlib.pyplot import cm
from mpl_toolkits.axes_grid1 import make_axes_locatable
_, spectoAx = plt.subplots()
if "cmap" in kwargs:
cmap = kwargs["cmap"]
else:
cmap = "bone"
spectoAx.pcolormesh(
x,
y,
spec_data,
edgecolors="face",
cmap=cmap,
norm=colors.LogNorm(),
shading="nearest",
)
if "minFreq" in kwargs:
minFreq = kwargs["minFreq"]
else:
minFreq = 0
spectoAx.set_xlim(minFreq, maxFreq)
spectoAx.set_ylim(channel_map[0], channel_map[-1])
spectoAx.set_xlabel("Frequency (Hz)")
spectoAx.set_ylabel("Channel")
divider = make_axes_locatable(spectoAx)
channel_spectoAx = divider.append_axes("top",
1.2,
pad=0.1,
sharex=spectoAx)
meanfreq_powerAx = divider.append_axes("right",
1.2,
pad=0.1,
sharey=spectoAx)
plt.setp(
channel_spectoAx.get_xticklabels() +
meanfreq_powerAx.get_yticklabels(),
visible=False,
)
mn_power = np.mean(spec_data, 0)
if "channels" in kwargs:
channels = kwargs["channels"]
cols = iter(
cm.rainbow(np.linspace(0, 1, (len(kwargs["channels"])))))
else:
channels = np.arange(0, spec_data.shape[0], 60)
cols = iter(cm.rainbow(np.linspace(0, 1, (nchannels // 60) + 1)))
for i in channels:
c = next(cols)
channel_spectoAx.plot(
E.freqs[0::50],
10 * np.log10(spec_data[i, :] / mn_power),
c=c,
label=str(i),
)
channel_spectoAx.set_ylabel("Channel power(dB)")
channel_spectoAx.legend(
bbox_to_anchor=(0.0, 1.02, 1.0, 0.102),
loc="lower left",
mode="expand",
fontsize="x-small",
ncol=4,
)
if "frequencies" in kwargs:
lower_freqs = kwargs["frequencies"]
upper_freqs = lower_freqs[1::]
inc = np.diff([lower_freqs[-2], lower_freqs[-1]])
upper_freqs = np.append(upper_freqs, lower_freqs[-1] + inc)
else:
freq_inc = 6
lower_freqs = np.arange(1, maxFreq - freq_inc, freq_inc)
upper_freqs = np.arange(1 + freq_inc, maxFreq, freq_inc)
cols = iter(cm.nipy_spectral(np.linspace(0, 1, len(upper_freqs))))
mn_power = np.mean(spec_data, 1)
print(f"spec_data shape = {np.shape(spec_data)}")
print(f"mn_power shape = {np.shape(mn_power)}")
for freqs in zip(lower_freqs, upper_freqs):
freq_mask = np.logical_and(E.freqs[0::50] > freqs[0],
E.freqs[0::50] < freqs[1])
mean_power = 10 * np.log10(
np.mean(spec_data[:, freq_mask], 1) / mn_power)
c = next(cols)
meanfreq_powerAx.plot(
mean_power,
channel_map,
c=c,
label=str(freqs[0]) + " - " + str(freqs[1]),
)
meanfreq_powerAx.set_xlabel("Mean freq. band power(dB)")
meanfreq_powerAx.legend(
bbox_to_anchor=(0.0, 1.02, 1.0, 0.102),
loc="lower left",
mode="expand",
fontsize="x-small",
ncol=1,
)
if "saveas" in kwargs:
saveas = kwargs["saveas"]
plt.savefig(saveas)
plt.show()
def plotSpectrogramByDepth(self, nchannels=384, nseconds=100, maxFreq=125, **kwargs):
"""
Plots a heat map spectrogram of the LFP for each channel.
Line plots of power per frequency band and power on a subset of channels are
also displayed to the right and above the main plot.
Parameters
----------
nchannels : int
The number of channels on the probe
nseconds : int, optional
How long in seconds from the start of the trial to do the spectrogram for (for speed).
Default 100
maxFreq : int
The maximum frequency in Hz to plot the spectrogram out to. Maximum 1250.
Default 125
Notes
-----
Should also allow kwargs to specify exactly which channels and / or frequency
bands to do the line plots for
"""
import os
lfp_file = os.path.join(self.path2LFPdata, 'continuous.dat')
status = os.stat(lfp_file)
nsamples = int(status.st_size / 2 / nchannels)
mmap = np.memmap(lfp_file, np.int16, 'r', 0, (nchannels, nsamples), order='F')
# Load the channel map NB assumes this is in the AP data location and that kilosort was run there
channel_map = np.squeeze(np.load(os.path.join(self.path2APdata, 'channel_map.npy')))
lfp_sample_rate = 2500
data = np.array(mmap[channel_map, 0:nseconds*lfp_sample_rate])
from ephysiopy.common.ephys_generic import EEGCalcsGeneric
E = EEGCalcsGeneric(data[0, :], lfp_sample_rate)
E.calcEEGPowerSpectrum()
spec_data = np.zeros(shape=(data.shape[0], len(E.sm_power[0::50])))
for chan in range(data.shape[0]):
E = EEGCalcsGeneric(data[chan, :], lfp_sample_rate)
E.calcEEGPowerSpectrum()
spec_data[chan, :] = E.sm_power[0::50]
x, y = np.meshgrid(E.freqs[0::50], channel_map)
import matplotlib.colors as colors
from matplotlib.pyplot import cm
from mpl_toolkits.axes_grid1 import make_axes_locatable
_, spectoAx = plt.subplots()
spectoAx.pcolormesh(x, y, spec_data, edgecolors='face', cmap='bone',norm=colors.LogNorm())
spectoAx.set_xlim(0, maxFreq)
spectoAx.set_ylim(channel_map[0], channel_map[-1])
spectoAx.set_xlabel('Frequency (Hz)')
spectoAx.set_ylabel('Channel')
divider = make_axes_locatable(spectoAx)
channel_spectoAx = divider.append_axes("top", 1.2, pad = 0.1, sharex=spectoAx)
meanfreq_powerAx = divider.append_axes("right", 1.2, pad = 0.1, sharey=spectoAx)
plt.setp(channel_spectoAx.get_xticklabels() + meanfreq_powerAx.get_yticklabels(), visible=False)
mn_power = np.mean(spec_data, 0)
cols = iter(cm.rainbow(np.linspace(0,1,(nchannels//60)+1)))
for i in range(0, spec_data.shape[0], 60):
c = next(cols)
channel_spectoAx.plot(E.freqs[0::50], 10*np.log10(spec_data[i, :]/mn_power), c=c, label=str(i))
channel_spectoAx.set_ylabel('Channel power(dB)')
channel_spectoAx.legend(bbox_to_anchor=(0., 1.02, 1., .102), loc='lower left', mode='expand',
fontsize='x-small', ncol=4)
freq_inc = 6
lower_freqs = np.arange(1, maxFreq-freq_inc, freq_inc)
upper_freqs = np.arange(1+freq_inc, maxFreq, freq_inc)
cols = iter(cm.nipy_spectral(np.linspace(0,1,len(upper_freqs))))
mn_power = np.mean(spec_data, 1)
for freqs in zip(lower_freqs, upper_freqs):
freq_mask = np.logical_and(E.freqs[0::50]>freqs[0], E.freqs[0::50]<freqs[1])
mean_power = 10*np.log10(np.mean(spec_data[:, freq_mask],1)/mn_power)
c = next(cols)
meanfreq_powerAx.plot(mean_power, channel_map, c=c, label=str(freqs[0]) + " - " + str(freqs[1]))
meanfreq_powerAx.set_xlabel('Mean freq. band power(dB)')
meanfreq_powerAx.legend(bbox_to_anchor=(0., 1.02, 1., .102), loc='lower left', mode='expand',
fontsize='x-small', ncol=1)
if 'saveas' in kwargs:
saveas = kwargs['saveas']
plt.savefig(saveas)
plt.show()