Anti-segments in drops model #142 (#173)

analytics/models/drop_model.py

@@ -23,6 +23,8 @@ class DropModel(Model):
             'DROP_HEIGHT': 1,
             'DROP_LENGTH': 1,
             'WINDOW_SIZE': 240,
+            'conv_del_min': 54000,
+            'conv_del_max': 55000,
         }
 
     def do_fit(self, dataframe: pd.DataFrame, segments: list) -> None:
@@ -75,9 +77,36 @@ class DropModel(Model):
             labeled_drop = data[self.idrops[n] - self.state['WINDOW_SIZE']: self.idrops[n] + self.state['WINDOW_SIZE'] + 1]
             labeled_drop = labeled_drop - min(labeled_drop)
             auto_convolve = scipy.signal.fftconvolve(labeled_drop, labeled_drop)
-            convolve_jump = scipy.signal.fftconvolve(labeled_drop, self.model_drop)
+            convolve_drop = scipy.signal.fftconvolve(labeled_drop, self.model_drop)
             convolve_list.append(max(auto_convolve))
-            convolve_list.append(max(convolve_jump))
+            convolve_list.append(max(convolve_drop))
+            
+        del_conv_list = []
+        for segment in segments:
+            if segment['deleted']:
+                segment_from_index = utils.timestamp_to_index(dataframe, pd.to_datetime(segment['from'], unit='ms'))
+                segment_to_index = utils.timestamp_to_index(dataframe, pd.to_datetime(segment['to'], unit='ms'))
+                segment_data = data[segment_from_index: segment_to_index + 1]
+                if len(segment_data) == 0:
+                    continue
+                flat_segment = segment_data.rolling(window = 5).mean()
+                flat_segment_dropna = flat_segment.dropna()
+                pdf = gaussian_kde(flat_segment_dropna)
+                x = np.linspace(flat_segment_dropna.min() - 1, flat_segment_dropna.max() + 1, len(flat_segment_dropna))
+                y = pdf(x)
+                ax_list = []
+                for i in range(len(x)):
+                    ax_list.append([x[i], y[i]])
+                ax_list = np.array(ax_list, np.float32)
+                antipeaks_kde = argrelextrema(np.array(ax_list), np.less)[0]
+                segment_median = ax_list[antipeaks_kde[0], 0]
+                cen_ind = utils.intersection_segment(flat_segment.tolist(), segment_median) #finds all interseprions with median
+                drop_center = cen_ind[0] # or -1? test
+                segment_cent_index = drop_center - 5 + segment_from_index
+                deleted_drop = data[segment_cent_index - self.state['WINDOW_SIZE'] : segment_cent_index + self.state['WINDOW_SIZE'] + 1]
+                deleted_drop = deleted_drop - min(labeled_drop)
+                del_conv_drop = scipy.signal.fftconvolve(deleted_drop, self.model_drop)
+                del_conv_list.append(max(del_conv_drop)) 
 
         if len(confidences) > 0:
             self.state['confidence'] = float(min(confidences))
@@ -104,6 +133,16 @@ class DropModel(Model):
         else:
             self.state['DROP_LENGTH'] = 1
             
+        if len(del_conv_list) > 0:
+            self.state['conv_del_min'] = float(min(del_conv_list))
+        else:
+            self.state['conv_del_min'] = self.state['WINDOW_SIZE']
+            
+        if len(del_conv_list) > 0:
+            self.state['conv_del_max'] = float(max(del_conv_list))
+        else:
+            self.state['conv_del_max'] = self.state['WINDOW_SIZE']
+
     def do_predict(self, dataframe: pd.DataFrame) -> list:
         data = dataframe['value']
         possible_drops = utils.find_drop(data, self.state['DROP_HEIGHT'], self.state['DROP_LENGTH'] + 1)
@@ -133,6 +172,8 @@ class DropModel(Model):
                 conv = scipy.signal.fftconvolve(convol_data, pattern_data)
                 if conv[self.state['WINDOW_SIZE']*2] > self.state['convolve_max'] * 1.2 or conv[self.state['WINDOW_SIZE']*2] < self.state['convolve_min'] * 0.8:
                     delete_list.append(segment)
+                 if max(conv) < self.state['conv_del_max'] * 1.02 and max(conv) > self.state['conv_del_min'] * 0.98:
+                    delete_list.append(segment)
             else:
                 delete_list.append(segment)
         # TODO: implement filtering