def segment_data():
"""
Clean the data
"""
print("segment data")
study_list = retrieve_ref('study_list')
sensor_list = retrieve_ref('sensor_list')
segment_list = retrieve_ref('segment_list')
timePreStudy = retrieve_ref('timePreStudy')
timePostStudy = retrieve_ref('timePostStudy')
for study in study_list:
df_meta = retrieve_meta(study)
source_path = list(df_meta['source_path'])
for record in source_path:
for sensor in sensor_list:
for segment in segment_list:
# print('segment_list')
# print(segment_list)
analysis_type = 'truncate'
df = retrieve_analyzed(study, analysis_type, record,
sensor)
if segment == segment_list[0]:
timeEnd = timePreStudy
df = df.drop(df[df['timeMinutes'] > timeEnd].index)
if segment == segment_list[1]:
timeBegin = timePreStudy
timeEnd = timePostStudy
df = df.drop(df[df['timeMinutes'] < timeBegin].index)
df = df.drop(df[df['timeMinutes'] > timeEnd].index)
if segment == segment_list[2]:
timeBegin = timePostStudy
df = df.drop(df[df['timeMinutes'] < timeBegin].index)
path = os.path.join(study, 'segment')
if not os.path.isdir(path): os.mkdir(path)
# print(path)
path = os.path.join(study, 'segment', str(segment))
if not os.path.isdir(path): os.mkdir(path)
# print(path)
path = os.path.join(study, 'segment', str(segment), record)
if not os.path.isdir(path): os.mkdir(path)
# print(path)
path = os.path.join(study, 'segment', str(segment), record,
sensor + ".csv")
df.to_csv(path)
print('segments file saved: ' + str(path))
def segment_records():
"""
segment records
"""
print("begin segmenting records")
study_list = retrieve_ref('study_list')
format_types = retrieve_ref('format_types')
segment_list = retrieve_ref('segment_list')
sensor_list = retrieve_ref('sensor_list')
timePreStudy = retrieve_ref('timePreStudy')
timePostStudy = retrieve_ref('timePostStudy')
for study in study_list:
df_meta = retrieve_meta(study)
source_path = list(df_meta['source_path'])
for record in source_path:
for format in format_types:
for sensor in sensor_list:
df = retrieve_analyzed(study, format, record, 'All',
sensor)
for segment in segment_list:
if segment == segment_list[0]:
timeEnd = timePreStudy
df = df.drop(df[df['timeMinutes'] > timeEnd].index)
if segment == segment_list[1]:
timeBegin = timePreStudy
timeEnd = timePostStudy
df = df.drop(
df[df['timeMinutes'] < timeBegin].index)
df = df.drop(df[df['timeMinutes'] > timeEnd].index)
if segment == segment_list[2]:
timeBegin = timePostStudy
df = df.drop(
df[df['timeMinutes'] < timeBegin].index)
path = os.path.join(study, 'formatted', format, record,
segment)
if not os.path.isdir(path): os.mkdir(path)
file_path = os.path.join(study, 'formatted', format,
record, segment,
sensor + ".csv")
df.to_csv(file_path)
print('dataframe saved for segments: ' +
str(file_path))
def multiple_record_check():
"""
check the record for multiple records
"""
print("begin multiple record check")
study_list = retrieve_ref('study_list')
format_types = retrieve_ref('format_types')
segment_list = retrieve_ref('segment_list')
sensor_list = retrieve_ref('sensor_list')
timePreStudy = retrieve_ref('timePreStudy')
timePostStudy = retrieve_ref('timePostStudy')
for study in study_list:
df_meta = retrieve_meta(study)
source_path = list(df_meta['source_path'])
source_path_new = list(df_meta['source_path'])
timeBegin_list = list(df_meta['recordBegin'])
timeEnd_list = list(df_meta['recordEnd'])
for record in source_path:
i = df_meta[df_meta['source_path'] == record].index.values[0]
fullLength = float(df_meta.loc[i, 'fullLength'])
truncatedLength = float(df_meta.loc[i, 'truncatedLength'])
format_type = 'source'
segment = 'All'
sensor = 'TEMP'
df = retrieve_analyzed(study, format_type, record, segment, sensor)
new_record_list = []
if fullLength > truncatedLength + 30:
df = df.drop(df[df['timeMinutes'] < truncatedLength + 5].index)
# print('df = ')
# print(df)
timeUnix = list(df['timeUnix'])
timeMinutes = list(df['timeMinutes'])
measurements = list(df['measurement'])
for i in range(len(measurements)):
if i < len(measurements) - 30:
if measurements[i] + 3 < measurements[i + 28]:
print('new record found')
df = df.drop(
df[df['timeMinutes'] < timeMinutes[i +
28]].index)
time_end = find_record_end_from_temp(df)
print('time_end = ' + str(time_end))
df = df.drop(
df[df['timeMinutes'] > time_end].index)
# print('df = ')
# print(df)
wearable_name = record.split('_')
wearable_name = wearable_name[1]
recordName = str(
str(int(timeUnix[0])) + '_' +
str(wearable_name))
print('recordName = ' + str(recordName))
new_record_list.append(recordName)
source_path_new.append(record)
timeBegin_list.append(int(timeUnix[0]))
print('timeUnix[0:20] = ')
print(timeUnix[0:20])
timeEnd = min(timeUnix)
print('timeEnd = ' + str(timeEnd))
timeEnd = min(timeUnix) + 60
print('timeEnd = ' + str(timeEnd))
timeEnd_list.append(int(timeEnd))
break
df_meta_new = pd.DataFrame()
df_meta_new['source_path'] = source_path_new
df_meta_new['recordBegin'] = timeBegin_list
df_meta_new['recordEnd'] = timeEnd_list
save_meta(study, df_meta_new)
def format_truncate():
"""
timestamp the source
"""
print("begin format source")
study_list = retrieve_ref('study_list')
format_types = retrieve_ref('format_types')
segment_list = retrieve_ref('segment_list')
sensor_list = retrieve_ref('sensor_list')
format_type = 'source'
segment = 'All'
for study in study_list:
# print('study = ' + str(study))
df_meta = retrieve_meta(study)
source_path = list(df_meta['source_path'])
for record in source_path:
i = df_meta[df_meta['source_path'] == record].index.values[0]
truncatedLength = df_meta.loc[i, 'truncatedLength']
for sensor in sensor_list:
df = retrieve_analyzed(study, format_type, record, segment,
sensor)
df = df.drop(df[df['timeMinutes'] > truncatedLength].index)
# create the path to where timestamped data is saved
timestamped_path = os.path.join(study)
if not os.path.isdir(timestamped_path):
os.mkdir(timestamped_path)
timestamped_path = os.path.join(timestamped_path,
str('formatted'))
if not os.path.isdir(timestamped_path):
os.mkdir(timestamped_path)
timestamped_path = os.path.join(timestamped_path,
str('truncate'))
if not os.path.isdir(timestamped_path):
os.mkdir(timestamped_path)
timestamped_path = os.path.join(timestamped_path, str(record))
if not os.path.isdir(timestamped_path):
os.mkdir(timestamped_path)
timestamped_path = os.path.join(timestamped_path, str(segment))
if not os.path.isdir(timestamped_path):
os.mkdir(timestamped_path)
timestamped_file = os.path.join(timestamped_path,
sensor + ".csv")
# print('timestamped_file = ' + str(timestamped_file))
df.to_csv(timestamped_file)
print('format truncate file saved = ' + str(timestamped_file))
def statisticSegments():
"""
Calculate and save statistics from each record
"""
print("begin statistical calculation")
study_list = retrieve_ref('study_list')
sensor_list = retrieve_ref('sensor_list')
segment_list = retrieve_ref('segment_list')
analysis_type = 'truncate'
for study in study_list:
df_meta = retrieve_meta(study)
source_path = list(df_meta['source_path'])
dfStatistics = pd.DataFrame()
statistics_types = ['mean', 'median', 'pVariance', 'stdev' 'quan']
quan_types = [10, 20, 30, 40, 50, 60, 70, 80, 90]
for record in source_path:
dfStatistics['source_path'] = source_path
for sensor in sensor_list:
for segment in segment_list:
for statis in statistics_types:
colName = str(sensor + '_' + segment + '_' + statis)
if statis == 'quan':
for quanNum in quan_types:
colName = str(sensor + '_' + segment + '_' +
statis + '_' + str(quanNum))
dfStatistics[colName] = [None] * len(source_path)
analyzed_path = os.path.join(study, 'analyzed')
if not os.path.isdir(analyzed_path): os.mkdir(analyzed_path)
analyzed_path = os.path.join(study, 'analyzed', 'statistics')
if not os.path.isdir(analyzed_path): os.mkdir(analyzed_path)
analyzed_file = os.path.join(analyzed_path, 'statisticsSegments.csv')
print('analyzed_file = ' + str(analyzed_file))
dfStatistics.to_csv(analyzed_file)
# retrieve statistics file
df = pd.read_csv(analyzed_file)
for name in list(df.columns):
if 'Unnamed' in name:
del df[name]
for record in source_path:
for sensor in sensor_list:
for segment in segment_list:
df = retrieve_analyzed(study, analysis_type, record,
sensor)
measurement = list(df['measurement'])
for statis in statistics_types:
colName = str(sensor + '_' + segment + '_' + statis)
valueValue = 'None'
if statis == "mean":
valueValue = statistics.mean(measurement)
if statis == 'median':
valueValue = statistics.median(measurement)
if statis == 'pvariance':
valueValue = statistics.pvariance(measurement)
if statis == 'stdev': statistics.stdev(measurement)
if statis == 'quan':
for quanNum in quan_types:
colName = str(sensor + '_' + segment + '_' +
statis + '_' + str(quanNum))
valueValue = np.quantile(measurement, quanNum)
i = dfStatistics[dfStatistics['source_path'] ==
record].index.values[0]
# print('i = ' + str(i))
dfStatistics.loc[i, colName] = valueValue
dfStatistics.to_csv(analyzed_file)
print("end statistical calculation")
def statisticsCalculation():
"""
Calculate and save statistics from each record
"""
print("begin statistical calculation")
study_list = retrieve_ref('study_list')
sensor_list = retrieve_ref('sensor_list')
analysis_type = 'truncate'
for study in study_list:
df_meta = retrieve_meta(study)
source_path = list(df_meta['source_path'])
dfStatistics = pd.DataFrame()
for sensor in sensor_list:
dfMeanList, dfMedianList, dfPvariance, dfStdev = [], [], [], []
quan_10, quan_20, quan_30, quan_40, quan_50, quan_60, quan_70, quan_80, quan_90 = [], [], [], [], [], [], [], [], []
for record in source_path:
df = retrieve_analyzed(study, analysis_type, record, sensor)
measurement = list(df['measurement'])
# dfMean = statistics.mean(measurement)
# print('dfMean = ' + str(dfMean))
dfMeanList.append(statistics.mean(measurement))
dfMedianList.append(statistics.median(measurement))
dfPvariance.append(statistics.pvariance(measurement))
dfStdev.append(statistics.stdev(measurement))
quan_10.append(np.quantile(measurement, 0.1))
quan_20.append(np.quantile(measurement, 0.2))
quan_30.append(np.quantile(measurement, 0.3))
quan_40.append(np.quantile(measurement, 0.4))
quan_50.append(np.quantile(measurement, 0.5))
quan_60.append(np.quantile(measurement, 0.6))
quan_70.append(np.quantile(measurement, 0.7))
quan_80.append(np.quantile(measurement, 0.8))
quan_90.append(np.quantile(measurement, 0.9))
colName = str(str(sensor) + '_mean')
dfStatistics[colName] = dfMeanList
colName = str(str(sensor) + '_median')
# dfStatistics[colName] = dfMedianList
colName = str(str(sensor) + '_pvariance')
dfStatistics[colName] = dfPvariance
colName = str(str(sensor) + '_stdev')
dfStatistics[colName] = dfStdev
dfStatistics[str(str(sensor) + 'quan_10')] = quan_10
dfStatistics[str(str(sensor) + 'quan_20')] = quan_20
dfStatistics[str(str(sensor) + 'quan_30')] = quan_30
dfStatistics[str(str(sensor) + 'quan_40')] = quan_40
dfStatistics[str(str(sensor) + 'quan_50')] = quan_50
dfStatistics[str(str(sensor) + 'quan_60')] = quan_60
dfStatistics[str(str(sensor) + 'quan_70')] = quan_70
dfStatistics[str(str(sensor) + 'quan_80')] = quan_80
dfStatistics[str(str(sensor) + 'quan_90')] = quan_90
analyzed_path = os.path.join(study, 'analyzed')
if not os.path.isdir(analyzed_path): os.mkdir(analyzed_path)
analyzed_path = os.path.join(study, 'analyzed', 'statistics')
if not os.path.isdir(analyzed_path): os.mkdir(analyzed_path)
analyzed_file = os.path.join(analyzed_path, 'statistics.csv')
print('analyzed_file = ' + str(analyzed_file))
dfStatistics.to_csv(analyzed_file)
print('statistical analysis for study / sensor complete: ' +
str(study) + ' / ' + str(sensor))
plt.scatter(dfStatistics['EDA_mean'], dfStatistics['HR_mean'])
plt.xlabel('EDA mean')
plt.ylabel('HR mean')
plot_path = os.path.join(study, 'plot')
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_path = os.path.join(study, 'plot', 'analyzed')
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_file = os.path.join(plot_path, 'summary' + '.png')
plt.savefig(plot_file, bbox_inches='tight')
print('saved statistics - ' + str(plot_file))
print("end statistical calculation")
def plot_timestamp():
"""
compare the curves to verify the end of the record was properly found
plot the source measurements for temperature
plot the timestamped data for the temperature
plot the truncated data
plot the timestamped and truncated on the same plot
"""
print("begin plotting timestamped data")
study_list = retrieve_ref('study_list')
sensor_list = retrieve_ref('sensor_list')
analysis_list = retrieve_ref('analysis_list')
for study in study_list:
metadata_path = os.path.join(study, 'meta')
metadata_file = os.path.join(metadata_path, 'metadata.csv')
df_meta = pd.read_csv(metadata_file)
# print(df_meta)
# timestamp temp
sensor = 'TEMP'
for study in study_list:
df_meta = retrieve_meta(study)
source_path = list(df_meta['source_path'])
for record in source_path:
row_num, col_num, plot_num = 4, 1, 0
row_width_mulp, col_width_mulp = 14, 5
plot_width, plot_height = col_num*row_width_mulp, row_num*col_width_mulp
plt.figure(figsize=(plot_width, plot_height))
# plot the timestamp in unix of timestamped record
plot_num += 1
plt.subplot(row_num, col_num, plot_num)
analysis_type = 'source'
df = retrieve_analyzed(study, analysis_type, record, sensor)
valueColor = retrieve_ref_color(str('color_' + str(analysis_type)))
plt.scatter(df['count'], df['measurement'], color = valueColor, label = str(analysis_type))
plt.title( analysis_type + ' ' + record + ' ' + sensor)
plt.xlabel('Measurement Count - Before Timestamp')
sensor_unit = retrieve_sensor_unit(sensor)
plt.ylabel(str(sensor) + ' ( ' + str(sensor_unit) + ' )')
plt.legend(bbox_to_anchor=(1, 0.5, 0.3, 0.2), loc='upper left')
# plot the timestamp in unix of timestamped record
plot_num += 1
plt.subplot(row_num, col_num, plot_num)
analysis_type = 'timestamp'
df = retrieve_analyzed(study, analysis_type, record, sensor)
valueColor = retrieve_ref_color(str('color_' + str(analysis_type)))
plt.scatter(df['timeMinutes'], df['measurement'], color = valueColor, label = str(analysis_type))
plt.title( analysis_type + ' ' + record + ' ' + sensor)
plt.xlabel('Time (Unix)')
sensor_unit = retrieve_sensor_unit(sensor)
plt.ylabel(str(sensor) + ' ( ' + str(sensor_unit) + ' )')
plt.legend(bbox_to_anchor=(1, 0.5, 0.3, 0.2), loc='upper left')
# plot both the original and the truncated record
plot_num += 1
plt.subplot(row_num, col_num, plot_num)
for analysis_type in analysis_list:
df = retrieve_analyzed(study, analysis_type, record, sensor)
valueColor = retrieve_ref_color(str('color_' + str(analysis_type)))
plt.scatter(df['timeMinutes'], df['measurement'], color = valueColor, label = str(analysis_type))
plt.title( analysis_type + ' ' + record + ' ' + sensor)
plt.xlabel('Time (minutes)')
sensor_unit = retrieve_sensor_unit(sensor)
plt.ylabel(str(sensor) + ' ( ' + str(sensor_unit) + ' )')
plt.legend(bbox_to_anchor=(1, 0.5, 0.3, 0.2), loc='upper left')
# plot the truncated record
plot_num += 1
plt.subplot(row_num, col_num, plot_num)
analysis_type = 'truncate'
df = retrieve_analyzed(study, analysis_type, record, sensor)
valueColor = retrieve_ref_color(str('color_' + str(analysis_type)))
plt.scatter(df['timeMinutes'], df['measurement'], color = valueColor, label = str(analysis_type))
plt.title( analysis_type + ' ' + record + ' ' + sensor)
plt.xlabel('Time (minutes)')
sensor_unit = retrieve_sensor_unit(sensor)
plt.ylabel(str(sensor) + ' ( ' + str(sensor_unit) + ' )')
plt.legend(bbox_to_anchor=(1, 0.5, 0.3, 0.2), loc='upper left')
# save the plot
plot_path = os.path.join(study, 'plot')
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_path = os.path.join(study, 'plot', 'timestamp')
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_path = os.path.join(study, 'plot', 'timestamp', record)
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_file = os.path.join(plot_path, sensor + '.png')
plt.savefig(plot_file, bbox_inches='tight')
print("completed plotting timestamped data")
def find_paired_end():
"""
Find the end of the paired record
Add the end of the coregistered record in the meta file
"""
print("begin find_paired_end")
study_list = retrieve_ref('study_list')
format_type = 'truncate'
sensor = 'TEMP'
segment = 'All'
for study in study_list:
df_meta = retrieve_meta(study)
# print(df_meta)
source_path = list(df_meta['source_path'])
# recordCoregistered = list(df_meta['recordCoregistered'])
df_meta['recordEnd'] = [None] * len(source_path)
# there could be two wearables - or one
# one wearable was turned off before the other
# check if the participant record has one or two wearables
# if there are two find the earlier stop time and save to meta file
for record in source_path:
# find the max value in the "timeUnix' column of analyzed data"
df = retrieve_analyzed(study, format_type, record, segment, sensor)
timeEndRecord = max(list(df['timeUnix']))
# save that value in the dataframe
i = df_meta[df_meta['source_path'] == record].index.values[0]
df_meta.loc[i, 'recordEnd'] = int(timeEndRecord)
# print('i = ' + str(i))
recordCoregistered = df_meta.loc[i, 'recordCoregistered']
# print('recordCoregistered = ')
# print(recordCoregistered)
if pd.isnull(df_meta.loc[i, 'recordCoregistered']):
print('no pair found')
elif len(df_meta.loc[i, 'recordCoregistered']) > 3 + len(record):
recordCoregisteredStr = str(df_meta.loc[i,
'recordCoregistered'])
recordCoregisteredStrList = recordCoregisteredStr.split(' ')
timeEndRecord = []
for recordCoregisteredStr in recordCoregisteredStrList:
df = retrieve_analyzed(study, analysis_type,
recordCoregisteredStr, sensor)
timeEndRecord.append(max(list(df['timeUnix'])))
df_meta.loc[i, 'recordEnd'] = int(min(timeEndRecord))
save_meta(study, df_meta)
print('df_meta = ')
print(df_meta)
def plot_segment():
"""
Clean the data
"""
print("plot segment data")
study_list = retrieve_ref('study_list')
sensor_list = retrieve_ref('sensor_list')
segment_list = retrieve_ref('segment_list')
timePreStudy = retrieve_ref('timePreStudy')
timePostStudy = retrieve_ref('timePostStudy')
for study in study_list:
df_meta = retrieve_meta(study)
source_path = list(df_meta['source_path'])
for record in source_path:
row_num, col_num, plot_num = 6, 1, 0
row_width_mulp, col_width_mulp = 14, 5
plot_width, plot_height = col_num * row_width_mulp, row_num * col_width_mulp
plt.figure(figsize=(plot_width, plot_height))
for sensor in sensor_list:
# plot the timestamp in unix of timestamped record
plot_num += 1
plt.subplot(row_num, col_num, plot_num)
for segment in segment_list[0:-1]:
# print('segment_list')
# print(segment_list)
analysis_type = segment
df = retrieve_analyzed(study, analysis_type, record,
sensor)
# print(df)
valueColor = retrieve_ref_color(
str('color_' + str(segment)))
plt.scatter(df['timeMinutes'],
df['measurement'],
color=valueColor,
label=str(segment))
plt.title(analysis_type + ' ' + record + ' ' + sensor)
plt.xlabel('Measurement Count - Before Timestamp')
sensor_unit = retrieve_sensor_unit(sensor)
plt.ylabel(str(sensor) + ' ( ' + str(sensor_unit) + ' )')
plt.legend(bbox_to_anchor=(1, 0.5, 0.3, 0.2),
loc='upper left')
# save the plot
plot_path = os.path.join(study, 'plot')
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_path = os.path.join(study, 'plot', 'segment')
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_path = os.path.join(study, 'plot', 'segment', record)
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_file = os.path.join(plot_path, sensor + '.png')
plt.savefig(plot_file, bbox_inches='tight')
def plot_acc():
"""
compare the curves to verify the end of the record was properly found
plot the source measurements for temperature
plot the timestamped data for the temperature
plot the truncated data
plot the timestamped and truncated on the same plot
"""
print("begin plotting acc data")
study_list = retrieve_ref('study_list')
sensor_list = retrieve_ref('sensor_list')
analysis_list = retrieve_ref('analysis_list')
for study in study_list:
metadata_path = os.path.join(study, 'meta')
metadata_file = os.path.join(metadata_path, 'metadata.csv')
df_meta = pd.read_csv(metadata_file)
# print(df_meta)
# timestamp ACC
sensor = 'ACC'
for study in study_list:
df_meta = retrieve_meta(study)
source_path = list(df_meta['source_path'])
for record in source_path:
row_num, col_num, plot_num = 5, 1, 0
row_width_mulp, col_width_mulp = 20, 5
plot_width, plot_height = col_num * row_width_mulp, row_num * col_width_mulp
plt.figure(figsize=(plot_width, plot_height))
analysis_type = 'truncate'
df = retrieve_analyzed(study, analysis_type, record, sensor)
for name in list(df.columns):
if 'time' not in name:
plot_num += 1
plt.subplot(row_num, col_num, plot_num)
colorScatter = valueColor = retrieve_ref_color(
str('color_' + str(sensor) + '_' + str(name)))
plt.scatter(df['timeMinutes'],
df[name],
color=colorScatter,
label=str(name))
# plt.scatter(df['timeMinutes'], df['measurement'], label = str('vector'))
plt.title(analysis_type + ' ' + record + ' ' + sensor)
plt.xlabel('Time (Minutes)')
plt.ylabel(str(sensor + ' ' + name))
plt.xlim([0, 1.02 * max(list(df['timeMinutes']))])
plt.legend(bbox_to_anchor=(1, 0.5, 0.3, 0.2),
loc='upper left')
plot_num += 1
plt.subplot(row_num, col_num, plot_num)
for name in list(df.columns):
if 'time' not in name:
colorScatter = valueColor = retrieve_ref_color(
str('color_' + str(sensor) + '_' + str(name)))
plt.scatter(df['timeMinutes'],
df[name],
color=colorScatter,
label=str(name))
plt.title(analysis_type + ' ' + record + ' ' + sensor +
' ' + name)
plt.xlabel('Time (Minutes)')
sensor_unit = retrieve_sensor_unit(sensor)
plt.ylabel(
str(sensor + ' ' + name + ' ( ' + str(sensor_unit) +
' )'))
plt.xlim([0, 1.02 * max(list(df['timeMinutes']))])
plt.legend(bbox_to_anchor=(1, 0.5, 0.3, 0.2),
loc='upper left')
# save the plot
plot_path = os.path.join(study, 'plot')
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_path = os.path.join(study, 'plot', 'timestamp')
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_path = os.path.join(study, 'plot', 'timestamp', record)
if not os.path.isdir(plot_path): os.mkdir(plot_path)
plot_file = os.path.join(plot_path, sensor + '.png')
plt.savefig(plot_file, bbox_inches='tight')
print('saved plotted acc figure - ' + str(plot_file))
print("completed plotting acc data")