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import os
import numpy as np
import torch
import matplotlib.pyplot as plt
import pandas as pd
import math
plt.switch_backend('agg')
def adjust_learning_rate(optimizer, epoch, args):
# lr = args.learning_rate * (0.2 ** (epoch // 2))
if args.lradj == 'type1':
lr_adjust = {epoch: args.learning_rate * (0.5 ** ((epoch - 1) // 1))}
elif args.lradj == 'type2':
lr_adjust = {
2: 5e-5, 4: 1e-5, 6: 5e-6, 8: 1e-6,
10: 5e-7, 15: 1e-7, 20: 5e-8
}
elif args.lradj == 'type3':
lr_adjust = {epoch: args.learning_rate if epoch < 3 else args.learning_rate * (0.9 ** ((epoch - 3) // 1))}
elif args.lradj == "cosine":
lr_adjust = {epoch: args.learning_rate /2 * (1 + math.cos(epoch / args.train_epochs * math.pi))}
if epoch in lr_adjust.keys():
lr = lr_adjust[epoch]
for param_group in optimizer.param_groups:
param_group['lr'] = lr
print('Updating learning rate to {}'.format(lr))
class EarlyStopping:
def __init__(self, patience=7, verbose=False, delta=0):
self.patience = patience
self.verbose = verbose
self.counter = 0
self.best_score = None
self.early_stop = False
self.val_loss_min = np.inf
self.delta = delta
def __call__(self, val_loss, model, path):
score = -val_loss
if self.best_score is None:
self.best_score = score
self.save_checkpoint(val_loss, model, path)
elif score < self.best_score + self.delta:
self.counter += 1
print(f'EarlyStopping counter: {self.counter} out of {self.patience}')
if self.counter >= self.patience:
self.early_stop = True
else:
self.best_score = score
self.save_checkpoint(val_loss, model, path)
self.counter = 0
def save_checkpoint(self, val_loss, model, path):
if self.verbose:
print(f'Validation loss decreased ({self.val_loss_min:.6f} --> {val_loss:.6f}). Saving model ...')
torch.save(model.state_dict(), path + '/' + 'checkpoint.pth')
self.val_loss_min = val_loss
class dotdict(dict):
"""dot.notation access to dictionary attributes"""
__getattr__ = dict.get
__setattr__ = dict.__setitem__
__delattr__ = dict.__delitem__
class StandardScaler():
def __init__(self, mean, std):
self.mean = mean
self.std = std
def transform(self, data):
return (data - self.mean) / self.std
def inverse_transform(self, data):
return (data * self.std) + self.mean
def visual(true, preds=None, name='./pic/test.pdf'):
"""
Results visualization
"""
plt.figure()
if preds is not None:
plt.plot(preds, label='Prediction', linewidth=2)
plt.plot(true, label='GroundTruth', linewidth=2)
plt.legend()
plt.savefig(name, bbox_inches='tight')
def adjustment(gt, pred):
anomaly_state = False
for i in range(len(gt)):
if gt[i] == 1 and pred[i] == 1 and not anomaly_state:
anomaly_state = True
for j in range(i, 0, -1):
if gt[j] == 0:
break
else:
if pred[j] == 0:
pred[j] = 1
for j in range(i, len(gt)):
if gt[j] == 0:
break
else:
if pred[j] == 0:
pred[j] = 1
elif gt[i] == 0:
anomaly_state = False
if anomaly_state:
pred[i] = 1
return gt, pred
def cal_accuracy(y_pred, y_true):
return np.mean(y_pred == y_true)
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