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SintecProj.py
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SintecProj.py
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# from math import nan
# from typing import final
# from numpy.core.fromnumeric import ptp
from sklearn.model_selection import GridSearchCV
# import csv
import os
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import matplotlib as mplt
import scipy.fft
import scipy.signal
from scipy import stats
from pprint import pprint
from sklearn.linear_model import Ridge
from sklearn.svm import SVR
from sklearn.metrics import mean_absolute_error, mean_squared_error
# sklearn.metrics has a mean_squared_error function with a squared kwarg (defaults to True). Setting squared to False will return the RMSE.
class SintecProj(object):
"""docstring for SintecProj"""
def __init__(self):
self.fs = 125
self.mmHg_thresh = [5,10]
self.PREV_VAL = 15 # X * 0.1 = [s]
self.patient_path = str(os.getcwd())+'\\Patients'
self.dataset_path = str(os.getcwd())+'\\Dataset'
self.plot_setup()
self.save_figure = False
self.signal_list = [
'3001689','3001203','3000714','3515650','3516310','3510820',
'3513879','3513631','3511504','3512125','3513230','3503726',
'3509498','3509505','3508696','3508299','3506991','3505101',
'3507993','3508009','3505162','3505174','3503945','3503406',
'3503404','3502786','3403213','3700665','3700837','3703763',
'3703856','3703872','3704307','3704658','3704803','3705715',
'3705993','3402408','3402291','3600293','3602237','3602666',
'3600490','3600620','3601272','3403274','3604430','3604660',
'3604404','3605744','3904308','3603256','3604217','3607634',
'3608436','3608706','3609155','3609182','3609463','3606882',
'3602521','3602766','3602772','3603658','3604352','3607711',
'3605724','3904396','3606358','3607077','3907039','3607464',
'3606909','3609839','3800183','3800350','3900487','3901160',
'3901339','3905772','3903282','3901654','3902124','3902445',
'3902729','3902894','3905695','3904550','3902994','3904246']
def create_path(self, path):
if not os.path.exists(path):
os.makedirs(path)
def plot_setup(self):
self.figsize = (15,9)
self.create_path("Plots")
self.plot_path = os.getcwd()+'\\Plots'
plt.style.use('seaborn-darkgrid')
def plot(self, df, pat_name):
fig, axs = plt.subplots(2,1,sharex=True)
fig.set_size_inches(self.figsize)
axs[0].set_ylabel('ABP [mmHg]')
axs[1].set_ylabel('[mV]')
df['ABP'].plot(ax=axs[0])
plt.suptitle(f'Patient: {pat_name}')
df[['II','PLETH']].plot(ax=axs[1])
plt.tight_layout()
if self.save_figure: plt.savefig(f'{self.plot_path}\\{pat_name}.png')
plt.close()
if pat_name in self.signal_list: self.save_df(df,pat_name)
def save_df(self,df,pat_name):
self.create_path("Dataset")
df.to_csv(f'{os.getcwd()}\\Dataset\\{pat_name}.csv')
def data_reader(self):
for n,file in enumerate(os.listdir(self.patient_path)):
pat_name = file.split('_')[0]
print(f'Patient: {pat_name} - {n}\{len(os.listdir(self.patient_path))}')
df = pd.read_csv(f'{self.patient_path}\\{file}',quotechar="'",sep=',',skiprows=[1])
if df.iloc[0][0][0] == '"':
df.columns = [x.replace('"',"") for x in df.columns]
df.columns = [x.replace("'","") for x in df.columns]
df['Time'] = df['Time'].apply(lambda x: x[3:-2])
df[df.columns[-1]] = df[df.columns[-1]].apply(lambda x: x[:-1])
df = df.replace('-', np.nan)
df.index = df['Time']
def_columns = []
for x in df.columns:
if 'ABP' in x or x=='II' or 'PLETH' in x:
def_columns.append(x)
df = df[def_columns]
df = df.astype(float)
self.plot(df,pat_name)
else:
df['Time'] = df['Time'].apply(lambda x: x[1:-1])
df.index = df['Time']
df = df.replace('-', np.nan)
df = df[['ABP','PLETH','II']]
df = df.astype(float)
self.plot(df,pat_name)
def peak_finder(self):
self.create_path('Plots\\Peaks')
tmp_path = self.plot_path+'\\Peaks'
file_lst = [x for x in os.listdir(self.dataset_path) if x.endswith('.csv')]
# file_lst = [x for x in os.listdir(self.dataset_path) if '3601140' in x]
for file in file_lst:
patient = file.split('.')[0]
print(f'Patient: {patient}')
print()
df = pd.read_csv(f'{self.dataset_path}\\{file}').dropna()
df.index = range(0,len(df))
# Filtering the signal
b, a = scipy.signal.butter(N=5,
Wn=[1,10],
btype='band',
analog=False,
output='ba',
fs=125
)
ecg_filt = scipy.signal.filtfilt(b,a,df['II'])
ecg_diff = np.gradient(np.gradient(ecg_filt))
ppg_filt = scipy.signal.filtfilt(b,a,df['PLETH'])
#find DBP/SBP points
DBPs,_ = scipy.signal.find_peaks(-df['ABP'],prominence=.5,distance=60,width=10)
SBPs,_ = scipy.signal.find_peaks(df['ABP'],prominence=.5,distance=60,width=10)
x_abp, kde_abp, kde_pks = self.gaussian_distributions(df['ABP'],np.concatenate((DBPs, SBPs), axis=None))
#find R peaks
Rs,_ = scipy.signal.find_peaks(ecg_filt,distance=60)
Rs_diff,_ = scipy.signal.find_peaks(-ecg_diff,distance=60) #discarded because of patient 3600490
x_ecg, kde_ecg, kde_rs = self.gaussian_distributions(ecg_filt,Rs)
x_ecg1, kde_ecg1, kde_rs1 = self.gaussian_distributions(ecg_filt,Rs_diff)
#find SP peaks
SPs,_ = scipy.signal.find_peaks(ppg_filt,prominence=.05,width=10)
SPs_new, [kde_ppg, kde_sp, x_ppg, min_] = self.PPG_peaks_cleaner(ppg_filt, SPs)
# print(SPs_new)
if True:
plt.style.use('default')
fig, axs = plt.subplots(3,2,sharex=True)
fig.set_size_inches(self.figsize)
gs = mplt.gridspec.GridSpec(3, 2, width_ratios=[3, 1])
# PLOT
axs[0,0] = plt.subplot(gs[0,0])
axs[0,0].plot(df['ABP'],label='ABP')
axs[0,0].scatter(DBPs,df['ABP'][DBPs],label='DBP',c='r')
axs[0,0].scatter(SBPs,df['ABP'][SBPs],label='SBP',c='g')
axs[0,0].set_ylabel('ABP[mmHg]')
# Gaussian dist. - ABP
axs[0,1] = plt.subplot(gs[0,1])
axs[0,1].plot(kde_abp(x_abp),x_abp,label='KDE of ABP')
axs[0,1].plot(kde_pks(x_abp),x_abp,label='KDE of ABP peaks')
axs[1,0] = plt.subplot(gs[1,0])
axs[1,0].plot(ecg_filt,label='ECG Filtered')
# axs[1].plot(df['II'],label='ECG')
axs[1,0].scatter(Rs_diff,ecg_filt[Rs_diff],label='R peaks - with gradient',s=100,c='r')
axs[1,0].scatter(Rs,ecg_filt[Rs],label='R peaks',c='y')
axs[1,0].set_ylabel('ECG [mV]')
# Gaussian dist. - ECG
axs[1,1] = plt.subplot(gs[1,1])
axs[1,1].plot(kde_ecg(x_ecg),x_ecg,label='KDE of ECG')
axs[1,1].plot(kde_rs(x_ecg),x_ecg,label='KDE of R peaks')
axs[1,1].plot(kde_rs1(x_ecg1),x_ecg1,label='KDE of R peaks - with gradient')
axs[2,0] = plt.subplot(gs[2,0])
axs[2,0].plot(ppg_filt,label='PPG Filtered')
# axs[2].plot(df['PLETH'],label='PPG')
axs[2,0].scatter(SPs,ppg_filt[SPs],label='SP peaks - first evalutation',s=100,c='r')
axs[2,0].scatter(SPs_new,ppg_filt[SPs_new],label='SP peaks - after KDE',c='y')
axs[2,0].set_ylabel('PPG [mV]')
# Gaussian dist. - PPG
axs[2,1] = plt.subplot(gs[2,1])
axs[2,1].plot(kde_ppg(x_ppg),x_ppg,label='KDE of PPG')
axs[2,1].plot(kde_sp(x_ppg),x_ppg,label='KDE of SP peaks')
if min_ != None:
axs[2,1].axhline(min_,c='red',label='Threshold')
axs[2,0].axhline(min_,c='red',label='Threshold')
[axs[x,0].legend(loc='lower left', facecolor='white', framealpha=.8) for x in range(3)]
[axs[x,1].legend(facecolor='white', framealpha=.8) for x in range(3)]
[axs[x,1].set_yticklabels([]) for x in range(3)]
x_ticks = np.arange(0,len(ppg_filt)+1,500)
for x in range(3):
axs[x,0].set_xlabel('Time [s]')
axs[x,0].set_xticks(x_ticks)
axs[x,0].set_xticklabels((x_ticks/self.fs).astype(int))
# print(f'ECG vector: {ecg_filt}')
# print(f'PPG vector: {ppg_filt}')
plt.suptitle(f'Patient: {patient}')
plt.tight_layout()
if self.save_figure: plt.savefig(f'{tmp_path}\\{patient}')
# plt.show()
dataset = self.find_PTT(ecg_filt,Rs,ppg_filt,SPs_new,patient)
df.index = np.array(list(df.index))/self.fs
# print(df)
dataset['DBP'] = df['ABP'].iloc[DBPs]
dataset['SBP'] = df['ABP'].iloc[SBPs]
regr_path = self.dataset_path+'\\Regression'
self.create_path(regr_path)
dataset.to_csv(f'{regr_path}\\{patient}.csv')
def gaussian_distributions(self,curve,peaks):
x = np.arange(min(curve),max(curve),.001)
kde_curve = stats.gaussian_kde(curve)
kde_peaks = stats.gaussian_kde(curve[peaks])
return x, kde_curve, kde_peaks
def PPG_peaks_cleaner(self, ppg, SP):
check_plot = False
x_ppg, kde_ppg, kde_sp = self.gaussian_distributions(ppg, SP)
if check_plot: plt.figure()
peak_sp,_ = scipy.signal.find_peaks(kde_sp(x_ppg))
n_peaks = len(peak_sp)
minimum = None
if n_peaks == 2:
# sp_idx = np.argmin(kde_sp(x_ppg)[peak_sp])
minimum = scipy.signal.find_peaks(-kde_sp(x_ppg)[peak_sp[0]:peak_sp[1]])
minimum = x_ppg[peak_sp[0]:peak_sp[1]][minimum[0]][0]
if minimum < .90*max(x_ppg):
SP = [x for x in SP if ppg[x] > minimum]
if check_plot:
plt.plot(x_ppg, kde_sp(x_ppg))
plt.plot(x_ppg[peak_sp[0]:peak_sp[1]],kde_sp(x_ppg)[peak_sp[0]:peak_sp[1]])
plt.plot(x_ppg[peak_sp[0]:peak_sp[1]],-kde_sp(x_ppg)[peak_sp[0]:peak_sp[1]])
plt.axvline(x_ppg[peak_sp[0]],ls='--',label='1st peak')
plt.axvline(x_ppg[peak_sp[1]],ls='-.',label='2nd peak')
plt.axvline(minimum,label='Minimum')
plt.legend()
else: minimum = None
curves = [kde_ppg, kde_sp, x_ppg, minimum]
if check_plot: plt.show()
return SP, curves
def find_PTT(self,ECG,ECG_peaks,PPG,PPG_peaks,patient):
#ECG_peaks,PPG_peaks: vectors containig indices of peaks
#ECG,PPG: vectors containig ECG/PPG curves
plt.style.use('seaborn-darkgrid')
self.create_path('Plots\\HR and PTT')
tmp_path = self.plot_path+'\\HR and PTT'
#transofrm in time series:
ecg_TS = np.array(ECG_peaks)/self.fs
ppg_TS = np.array(PPG_peaks)/self.fs
# print(f'ECG in seconds:{ecg_TS}')
# print(f'PPG in seconds:{ppg_TS}')
#HR evaluation:
HR = 60/(ecg_TS[1::] - ecg_TS[0:-1])
# print(f'HR:{HR}')
plt.close('all')
fig, axs = plt.subplots(2,1,sharex=True)
fig.set_size_inches(self.figsize)
axs[0].plot(ecg_TS[1:],HR,label='Heart Rate')
axs[0].set_title(f'HR and SP peaks cleaning for patient: {patient}')
#HR cleaning:
LEN_WDW = int(len(HR)/5)
for x in range(10):
HR_tmp = HR[int(LEN_WDW*x*.5):int(LEN_WDW*(1+x*.5))]
if np.std(HR_tmp) > 3:
up_bound, low_bound = np.mean(HR_tmp)+np.std(HR_tmp), np.mean(HR_tmp)-np.std(HR_tmp)
# axs[0].axhline(np.mean(HR_tmp),c='r',lw=4, label='Mean Value')
axs[0].fill_between(ecg_TS[1:][int(LEN_WDW*x*.5):int(LEN_WDW*(1+x*.5))], low_bound, up_bound, alpha=0.15, color='tab:red', lw=4)
# else: axs[0].fill_between(ecg_TS[int(LEN_WDW*x*.5):int(LEN_WDW*(1+x*.5))], low_bound, up_bound, alpha=0.15, color='tab:red', lw=4)
nan_idx = np.concatenate((np.argwhere(HR_tmp<=low_bound),np.argwhere(HR_tmp>=up_bound)))
nan_idx = list([int(LEN_WDW*x*.5)+y[0] for y in nan_idx])
HR[nan_idx] = np.nan
HR = pd.DataFrame(HR).interpolate(method='polynomial',order=5)
axs[0].plot(ecg_TS[1:],HR.values.tolist(),label='HR - cleaned',c='g')
axs[0].legend()
axs[0].set_ylabel('HR [mmHg]')
# print(f'HR: {HR}')
#PTT evaluation:
time = np.arange(0,max(max(ECG_peaks),max(PPG_peaks)),1)
real_time = time/self.fs
y = time*0
for k in time:
if time[k] in ECG_peaks:
y[k]=1
if time[k] in PPG_peaks:
y[k]=2
index = np.argwhere(y>0).flatten()
yy = list(y[index])
time1 = time[index]
results = []
b = [1,2]
results = [i for i in range(len(yy)) if yy[i:i+len(b)] == b]
index_rf = time1[np.array(results)]
index_spf = time1[np.array(results)+1]
time_rf = real_time[index_rf]
time_spf = real_time[index_spf]
# rf_diff = np.diff(time_rf)
ptt = time_spf - time_rf
#PTT cleaning:
axs[1].hlines(ptt, xmin=real_time[index_rf], xmax=real_time[index_spf], colors='tab:green', linestyles='solid', label='ptt')
# print(f'PTT: {pd.DataFrame(ptt)}')
for x in range(10):
PTT_tmp = ptt[int(LEN_WDW*x*.5):int(LEN_WDW*(1+x*.5))]
# print(PTT_tmp)
if np.std(PTT_tmp) > .05:
print(np.std(PTT_tmp))
up_bound, low_bound = np.mean(PTT_tmp)+np.std(PTT_tmp), np.mean(PTT_tmp)-np.std(PTT_tmp)
# axs[0].axhline(np.mean(HR_tmp),c='r',lw=4, label='Mean Value')
# axs[1].fill_between(ecg_TS[1:][int(LEN_WDW*x*.5):int(LEN_WDW*(1+x*.5))], low_bound, up_bound, alpha=0.15, color='tab:red', lw=4)
nan_idx = np.concatenate((np.argwhere(PTT_tmp<=low_bound),np.argwhere(PTT_tmp>=up_bound)))
nan_idx = list([int(LEN_WDW*x*.5)+y[0] for y in nan_idx])
ptt[nan_idx] = np.nan
TEMP = pd.DataFrame(columns=['Before','After'])
TEMP['Before'] = ptt
# print(f'Before: {ptt}')
ptt = pd.DataFrame(ptt).interpolate(method='polynomial',order=1)
TEMP['After'] = ptt
axs[1].set_ylabel('PTT [s]')
axs[1].plot(ecg_TS,ECG[ECG_peaks],'o-',label='R peaks')
axs[1].plot(real_time[index_rf],ECG[index_rf],'o-',label='R peaks - newly found')
axs[1].plot(ppg_TS,PPG[PPG_peaks],'o-',label='SP peaks')
axs[1].plot(real_time[index_spf],PPG[index_spf],'o-',label='SP peaks - newly found')
axs[1].hlines(ptt, xmin=real_time[index_rf], xmax=real_time[index_spf], colors='tab:red', linestyles='solid', label='ptt - newly found')
axs[1].legend()
plt.tight_layout()
if self.save_figure: plt.savefig(f'{tmp_path}\\{patient}')
tmp_df_hr = pd.DataFrame(HR)
tmp_df_hr.index = ecg_TS[1:]
tmp_df_ptt = pd.DataFrame(ptt)
tmp_df_ptt.index = real_time[index_rf]
df = pd.DataFrame({'Time':real_time})
df.index = df['Time']
df['HR'] = tmp_df_hr
df['PTT'] = tmp_df_ptt
return df.drop('Time',axis=1)
def regression_process(self):
from sklearn.preprocessing import PolynomialFeatures
from sklearn.linear_model import LinearRegression
from sklearn.ensemble import RandomForestRegressor
from sklearn.datasets import make_regression
TRAIN_PERC = .75
regr_path = 'Dataset\\Regression'
dbp_errors, sbp_errors = pd.DataFrame(), pd.DataFrame()
file_lst = os.listdir(regr_path)
final_dict_dbp, final_dict_sbp = {}, {}
# file_lst = file_lst[40::]
# file_lst = [x for x in os.listdir(regr_path) if '3601140' in x]
for file in file_lst:
patient = file.split('.')[0]
final_dict_sbp.update({patient:{}})
final_dict_dbp.update({patient:{}})
print(f'Patient: {patient}')
fig, axs = plt.subplots(2,1,sharex=True)
fig.set_size_inches((16,9))
df = pd.read_csv(regr_path+'\\'+file).set_index('Time')
df = df.dropna(how='all')
x_final = np.arange(0, 60,.1)
for i in x_final:
try:
df.loc[i]
except:
df.loc[i] = [np.nan,np.nan,np.nan,np.nan]
df = df.sort_values(by='Time')
df[['HR','SBP','DBP']].plot(style='o', ax=axs[0])
df[['PTT']].plot(style='o', ax=axs[1])
df[['HR','SBP','DBP']] = df[['HR','SBP','DBP']].interpolate(method='polynomial',order=1)
df['PTT'] = df['PTT'].interpolate(method='polynomial',order=1)
df = df.loc[x_final].dropna()
[axs[0].plot(df[x],'*',alpha=.4,label=y) for x,y in zip(['HR','SBP','DBP'],['HR - resampled','SBP - resampled','DBP - resampled'])]
axs[1].plot(df['PTT'],'*',alpha=.4,label='PTT - resampled')
[axs[i].legend() for i in range(2)]
axs[1].set_xlabel('Time [s]')
plt.tight_layout()
self.create_path('Plots\\interpolation')
if self.save_figure: plt.savefig(f'Plots\\interpolation\\{patient}.png')
# plt.show()
plt.close()
#REGRESSION
fig, axs = plt.subplots(4,1)
fig.set_size_inches((16,9))
axs[1].sharex(axs[0])
axs[2].sharex(axs[0])
train_cols = ['HR','PTT']
axs[0].set_ylabel('HR [bpm]', color='tab:red')
axs[0].plot(df['HR'],c='tab:red')
axs[0].tick_params(axis='y', labelcolor='tab:red')
axs_b = axs[0].twinx()
axs_b.set_ylabel('PTT [s]', color='tab:blue')
axs_b.plot(df['PTT'],c='tab:blue')
axs_b.tick_params(axis='y', labelcolor='tab:blue')
[x.grid() for x in [axs[0], axs_b]]
for x in train_cols:
for y in range(1,self.PREV_VAL):
df[f'{x}-{y}'] = df[x].shift(y)
df = df.dropna()
df['ones'] = np.ones(len(df))
train_cols = ['HR','PTT','ones']
for x in range(1,self.PREV_VAL):
train_cols.append(f'HR-{x}')
train_cols.append(f'PTT-{x}')
# final_cols = df.columns
# f = scipy.signal.resample(df, 550)
# beg,end = df.index[0],df.index[-1]
# xnew = np.linspace(beg,end, 550, endpoint=True)
# df = pd.DataFrame(f)
# df.index = xnew
# x_final = np.arange(5, 60,.1)
# tmp_df = pd.DataFrame(np.nan, index=x_final, columns=df.columns)
# df = df.append(tmp_df)
# df = df.sort_index().interpolate(method='polynomial',order=3)
# df = df.loc[x_final].dropna()
# df.columns = final_cols
#DBP Prediction
test_size = int(TRAIN_PERC*len(df.index))
X_train_dbp,y_train_dbp = df[train_cols].iloc[0:test_size], df['DBP'].iloc[0:test_size]
X_test_dbp,y_test_dbp = df[train_cols].iloc[test_size::], df['DBP'].iloc[test_size::]
#SBP Prediction
X_train_sbp,y_train_sbp = df[train_cols].iloc[0:test_size], df['SBP'].iloc[0:test_size]
X_test_sbp,y_test_sbp = df[train_cols].iloc[test_size::], df['SBP'].iloc[test_size::]
# axs[0].plot(X_train_dbp['HR'],'o')
# axs[1].plot(X_train_dbp['PTT'],'o')
# axs[2].plot(y_train_dbp,'o')
# # plt.show()
axs[1].plot(y_train_sbp,label='Train')
axs[2].plot(y_train_dbp,label='Train')
maes_dbp, maes_sbp = [],[]
count_dbp, count_sbp = [],[]
x_labs = []
# ====================================================================================
# Support Vector Regression
Cs = [50]
[x_labs.append(f'SVR: C={x}') for x in Cs]
for c in Cs:
regr = SVR(C=c, epsilon=0.2)
regr.fit(X_train_dbp, y_train_dbp)
y_hat_dbp = regr.predict(X_test_dbp)
axs[2].plot(y_test_dbp.index,y_hat_dbp,label=f'SVR: C={c}')
MAE_dbp = round(mean_absolute_error(y_test_dbp, y_hat_dbp),2)
count_dbp.append(self.count_diff(y_test_dbp, y_hat_dbp, 'SVR-DBP'))
maes_dbp.append(MAE_dbp)
regr = SVR(C=c, epsilon=.2)
regr.fit(X_train_sbp, y_train_sbp)
y_hat_sbp = regr.predict(X_test_sbp)
axs[1].plot(y_test_sbp.index,y_hat_sbp,label=f'SVR: C={c}')
MAE_sbp = round(mean_absolute_error(y_test_sbp, y_hat_sbp),2)
maes_sbp.append(MAE_sbp)
count_sbp.append(self.count_diff(y_test_sbp, y_hat_sbp, 'SVR-SBP'))
#====================================================================================
#Ridge Regression
alphas = [.01]
[x_labs.append(f'Ridge: alpha={x}') for x in alphas]
for alpha in alphas:
clf = Ridge(alpha=alpha)
y_hat_dbp = self.regression(clf,y_train_dbp,X_train_dbp,X_test_dbp)
axs[2].plot(y_test_dbp.index,y_hat_dbp,label=f'Ridge: alpha={alpha}')
MAE_dbp = round(mean_absolute_error(y_test_dbp, y_hat_dbp),2)
count_dbp.append(self.count_diff(y_test_dbp, y_hat_dbp, 'RR-DBP'))
maes_dbp.append(MAE_dbp)
y_hat_sbp = self.regression(clf,y_train_sbp,X_train_sbp,X_test_sbp)
axs[1].plot(y_test_sbp.index,y_hat_sbp,label=f'Ridge: alpha={alpha}')
MAE_sbp = round(mean_absolute_error(y_test_sbp, y_hat_sbp),2)
count_sbp.append(self.count_diff(y_test_sbp, y_hat_sbp, 'RR-SBP'))
maes_sbp.append(MAE_sbp)
#====================================================================================
#Random Forrest
nTrees=[100]
[x_labs.append(f'RF: n_trees={x}') for x in nTrees]
for trees in nTrees:
regr=RandomForestRegressor(n_estimators=trees,random_state=7,criterion='mae')
y_hat_dbp = self.regression(regr,y_train_dbp,X_train_dbp,X_test_dbp)
# y_hat_dbp = regr.predict(X_test_dbp)
axs[2].plot(y_test_dbp.index,y_hat_dbp,label=f'RF: n_trees={trees}')
MAE_dbp = round(mean_absolute_error(y_test_dbp, y_hat_dbp),2)
count_dbp.append(self.count_diff(y_test_dbp, y_hat_dbp, 'RF-DBP'))
maes_dbp.append(MAE_dbp)
regr.fit(X_train_sbp, y_train_sbp)
y_hat_sbp = self.regression(regr,y_train_sbp,X_train_sbp,X_test_sbp)
axs[1].plot(y_test_sbp.index,y_hat_sbp,label=f'RF: n_trees={trees}')
MAE_sbp = round(mean_absolute_error(y_test_sbp, y_hat_sbp),2)
count_sbp.append(self.count_diff(y_test_sbp, y_hat_sbp, 'RF-SBP'))
maes_sbp.append(MAE_sbp)
#====================================================================================
# Linear regression
w_dbp = (np.linalg.inv(X_train_dbp.values.T@X_train_dbp.values))@(X_train_dbp.values.T@y_train_dbp.values)
y_hat_dbp = X_test_dbp.values@w_dbp
axs[2].plot(y_test_dbp.index,y_hat_dbp,label='Linear')
MAE_dbp = round(mean_absolute_error(y_test_dbp, y_hat_dbp),2)
maes_dbp.append(MAE_dbp)
count_dbp.append(self.count_diff(y_test_dbp, y_hat_dbp, 'Lin-DBP'))
w_sbp = (np.linalg.inv(X_train_sbp.values.T@X_train_sbp.values))@(X_train_sbp.values.T@y_train_sbp.values)
y_hat_sbp = X_test_sbp.values@w_sbp
axs[1].plot(y_test_sbp.index,y_hat_sbp,label='Linear')
MAE_sbp = round(mean_absolute_error(y_test_sbp, y_hat_sbp),2)
maes_sbp.append(MAE_sbp)
count_sbp.append(self.count_diff(y_test_sbp, y_hat_sbp, 'Lin-SBP'))
x_labs.append(f'Linear')
#====================================================================================
axs[0].set_title(f'Prediction vs. Test for patient {patient}')
# axs[0].sharex(axs[2])
width = 0.35
axis = np.arange(len(maes_dbp))
axs[3].bar(axis+width/2,maes_dbp,width,label='DBP')
axs[3].bar(axis-width/2,maes_sbp,width,label='SBP')
axs[3].set_ylim(0,15)
axs[3].set_title('MAE for each algorithm')
# x_labs = [f'POL: {x}' for x in pol_orders]
# [x_labs.append(f'SVR: {x}') for x in Cs]
# x_labs.append('SVR: Best')
axs[3].set_xticks(range(len(x_labs)))
axs[3].set_xticklabels((x_labs))
axs[3].set_ylabel('MAE [-]')
axs[3].legend()
axs[1].plot(y_test_sbp,label='Test',ls='--',lw=2,c='tab:blue')
axs[1].set_ylabel('SBP [mmHg]')
axs[1].set_ylim(min(df['SBP'])-10,max(df['SBP'])+10)
axs[1].legend(ncol=3)
axs[2].plot(y_test_dbp,label='Test',ls='--',lw=2,c='tab:blue')
axs[2].set_ylabel('DBP [mmHg]')
axs[2].set_ylim(min(df['DBP'])-10,max(df['DBP'])+10)
axs[2].set_xlabel('Time [s]')
axs[2].legend(ncol=3)
for ax in plt.gcf().axes[0:2]:
try:
ax.label_outer()
except:
pass
print(df)
plt.tight_layout()
self.create_path('Plots\\Regression')
if self.save_figure: plt.savefig(f'Plots\\Regression\\{patient}.png')
dbp_errors[patient] = maes_dbp
sbp_errors[patient] = maes_sbp
for lab,err_sbp,err_dbp in zip(x_labs,count_sbp,count_dbp):
for cnt,thresh in enumerate(self.mmHg_thresh):
# print(lab,err)
final_dict_sbp[patient].update({f'{lab} > {thresh}':err_sbp[cnt]})
final_dict_dbp[patient].update({f'{lab} > {thresh}':err_dbp[cnt]})
# plt.show()
pd.DataFrame(final_dict_sbp).to_excel(f'{self.dataset_path}\\sbp_thresh_errors.xlsx')
pd.DataFrame(final_dict_dbp).to_excel(f'{self.dataset_path}\\dbp_thresh_errors.xlsx')
dbp_errors.index = x_labs
sbp_errors.index = x_labs
# print(dbp_errors)
# print(sbp_errors)
dbp_errors.to_excel(f'{self.dataset_path}\\dbp_errors.xlsx')
sbp_errors.to_excel(f'{self.dataset_path}\\sbp_errors.xlsx')
def best_fz(self):
for x in ['dbp','sbp']:
fname = f'{x}_errors.xlsx'
df = pd.read_excel(self.dataset_path+'\\'+fname).transpose()
df.columns = df.iloc[0]
# print(df)
df = df.iloc[1::].astype(float)
df = df.drop([x for x in df.columns if 'SVR' in x or '0.0001' in x or 'Linear' in x],axis=1)
df['best'] = df.idxmin(axis=1)
# df['real best'] = np.where(df.min(axis=1)<np.ones(len(df))*3)
df['real best'] = np.where(np.abs(df['Ridge: alpha=0.01']-df['RF: n_trees=100'])>0.9, True, False)
print(df)
df = df[df['real best']]
best_values = df['best'].value_counts(sort=True)
print(f'For {x.upper()} the best values are:')
print(best_values)
print()
def regression(self,clf,y_train,X_train,X_test):
from sklearn.preprocessing import RobustScaler
scaler_x = RobustScaler()
# scaler_y = StandardScaler()
# print(y_train)
X_train = (scaler_x.fit_transform(X_train))
# y_train = scaler_y.fit_transform(np.array(y_train).reshape(1,-1))
# print(y_train)
clf.fit(X_train, y_train)
pred = clf.predict(scaler_x.transform(X_test))
# pred = scaler_y.inverse_transform(np.array(pred).reshape(1,-1))
return pred
def GS_regression(self,clf,params,y_train,X_train,X_test):
clf = GridSearchCV(clf, params)
clf.fit(X_train,y_train)
pred_gs = clf.predict(X_test)
return pred_gs
def count_diff(self, test, pred, alg_type):
count_perc = []
for thresh in self.mmHg_thresh:
test, pred= np.array(test), np.array(pred)
diff = np.abs(test - pred)
count = sum(i > thresh for i in diff)
count_perc.append(round(100*count/len(test),1))
# print(f'{count_perc}[%] > {thresh} [mmHg] for {alg_type}')
# print()
return count_perc