def get_feature(edf_file):
reader = EdfReader(edf_file)
n = reader.signals_in_file
buffer = np.zeros((n, reader.getNSamples()[0]))
for i in np.arange(n):
buffer[i, :] = reader.readSignal(i)
signal = list(buffer[0])
signal_len = 64
return FeatureExt(signal, signal_len)
class ChbEdfFile(object):
"""
Edf reader using pyedflib
"""
def __init__(self, filename, patient_id=None):
self._filename = filename
self._patient_id = patient_id
self._file = EdfReader(filename)
def get_filename(self):
return self._filename
def get_n_channels(self):
"""
Number of channels
"""
return len(self._file.getSampleFrequencies())
def get_n_data_points(self):
"""
Number of data points
"""
if len(self._file.getNSamples()) < 1:
raise ValueError("Number of channels is less than 1")
return self._file.getNSamples()[0]
def get_channel_names(self):
"""
Names of channels
"""
return self._file.getSignalLabels()
def get_channel_scalings(self):
"""
Channel scalings as an array
:return:
"""
out = np.zeros(self.get_n_channels())
for i in range(self.get_n_channels()):
out[i] = self._file.getPhysicalMaximum(
i) - self._file.getPhysicalMinimum(i)
return out
def get_file_duration(self):
"""
Returns the file duration in seconds
"""
return self._file.getFileDuration()
def get_sampling_rate(self):
"""
Get the frequency
"""
if len(self._file.getSampleFrequencies()) < 1:
raise ValueError("Number of channels is less than 1")
return self._file.getSampleFrequency(0)
def get_channel_data(self, channel_id):
"""
Get raw data for a single channel
"""
if channel_id >= self.get_n_channels() or channel_id < 0:
raise ValueError("Illegal channel id selected %d" % channel_id)
return self._file.readSignal(channel_id)
def get_data(self):
"""
Get raw data for all channels
"""
output_data = np.zeros(
(self.get_n_data_points(), self.get_n_channels()))
for i in range(self.get_n_channels()):
output_data[:, i] = self._file.readSignal(i)
return output_data
def get_start_datetime(self):
"""
Get the starting date and time
"""
return self._file.getStartdatetime()
def get_end_datetime(self):
return self._file.getStartdatetime() + datetime.timedelta(
seconds=self._file.getFileDuration())
# -*- coding: utf-8 -*-
"""
Created on Sun Jan 5 16:17:58 2020
@author: Dell
"""
# %% importing dependancies
from pyedflib import EdfReader
import numpy as np
# %% importing the dataset
filepath = 'D:\Mini II\DATASETS\eNTERFACING\Data\EEG\Part1_IAPS_SES1_EEG_fNIRS_03082006.bdf'
f = EdfReader(filepath)
n = f.signals_in_file
signal_labels = f.getSignalLabels()
sigbufs = np.zeros((n, f.getNSamples()[0]))
for i in np.arange(n):
sigbufs = f.readSignal(i)
# %%