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104 lines
4.4 KiB
104 lines
4.4 KiB
from models import Model |
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import utils |
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import numpy as np |
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import pandas as pd |
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import scipy.signal |
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from scipy.fftpack import fft |
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from scipy.signal import argrelextrema |
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from scipy.stats.stats import pearsonr |
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import math |
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from scipy.stats import gaussian_kde |
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from scipy.stats import norm |
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PEARSON_COEFF = 0.7 |
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class GeneralModel(Model): |
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def __init__(self): |
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super() |
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self.state = { |
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'pattern_center': [], |
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'pattern_model': [], |
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'convolve_max': 240, |
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'convolve_min': 200, |
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'WINDOW_SIZE': 0, |
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'conv_del_min': 0, |
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'conv_del_max': 0, |
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} |
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self.all_conv = [] |
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self.all_corr = [] |
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def get_model_type(self) -> (str, bool): |
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model = 'general' |
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type_model = True |
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return (model, type_model) |
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def find_segment_center(self, dataframe: pd.DataFrame, start: int, end: int) -> int: |
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data = dataframe['value'] |
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segment = data[start: end] |
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center_ind = start + math.ceil((end - start) / 2) |
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return center_ind |
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def do_fit(self, dataframe: pd.DataFrame, labeled_segments: list, deleted_segments: list, learning_info: dict) -> None: |
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data = utils.cut_dataframe(dataframe) |
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data = data['value'] |
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last_pattern_center = self.state.get('pattern_center', []) |
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self.state['pattern_center'] = list(set(last_pattern_center + learning_info['segment_center_list'])) |
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self.state['pattern_model'] = utils.get_av_model(learning_info['patterns_list']) |
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convolve_list = utils.get_convolve(self.state['pattern_center'], self.state['pattern_model'], data, self.state['WINDOW_SIZE']) |
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correlation_list = utils.get_correlation(self.state['pattern_center'], self.state['pattern_model'], data, self.state['WINDOW_SIZE']) |
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del_conv_list = [] |
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delete_pattern_timestamp = [] |
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for segment in deleted_segments: |
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del_mid_index = segment.center_index |
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delete_pattern_timestamp.append(segment.pattern_timestamp) |
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deleted_pat = utils.get_interval(data, del_mid_index, self.state['WINDOW_SIZE']) |
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deleted_pat = utils.subtract_min_without_nan(deleted_pat) |
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del_conv_pat = scipy.signal.fftconvolve(deleted_pat, self.state['pattern_model']) |
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if len(del_conv_pat): del_conv_list.append(max(del_conv_pat)) |
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self.state['convolve_min'], self.state['convolve_max'] = utils.get_min_max(convolve_list, self.state['WINDOW_SIZE'] / 3) |
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self.state['conv_del_min'], self.state['conv_del_max'] = utils.get_min_max(del_conv_list, self.state['WINDOW_SIZE']) |
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def do_detect(self, dataframe: pd.DataFrame) -> list: |
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data = utils.cut_dataframe(dataframe) |
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data = data['value'] |
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pat_data = self.state.get('pattern_model', []) |
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if pat_data.count(0) == len(pat_data): |
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raise ValueError('Labeled patterns must not be empty') |
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self.all_conv = [] |
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self.all_corr = [] |
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window_size = self.state.get('WINDOW_SIZE', 0) |
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for i in range(window_size, len(data) - window_size): |
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watch_data = data[i - window_size: i + window_size + 1] |
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watch_data = utils.subtract_min_without_nan(watch_data) |
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conv = scipy.signal.fftconvolve(watch_data, pat_data) |
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correlation = pearsonr(watch_data, pat_data) |
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self.all_corr.append(correlation[0]) |
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self.all_conv.append(max(conv)) |
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all_conv_peaks = utils.peak_finder(self.all_conv, window_size * 2) |
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all_corr_peaks = utils.peak_finder(self.all_corr, window_size * 2) |
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filtered = self.__filter_detection(all_corr_peaks, data) |
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return set(item + window_size for item in filtered) |
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def __filter_detection(self, segments: list, data: list): |
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if len(segments) == 0 or len(self.state.get('pattern_center', [])) == 0: |
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return [] |
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delete_list = [] |
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for val in segments: |
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if self.all_conv[val] < self.state['convolve_min'] * 0.8: |
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delete_list.append(val) |
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continue |
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if self.all_corr[val] < PEARSON_COEFF: |
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delete_list.append(val) |
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continue |
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if (self.all_conv[val] < self.state['conv_del_max'] * 1.02 and self.all_conv[val] > self.state['conv_del_min'] * 0.98): |
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delete_list.append(val) |
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for item in delete_list: |
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segments.remove(item) |
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return set(segments)
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