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Division by zero issue #46

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Division by zero issue #46

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5 changes: 3 additions & 2 deletions core/data_processor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -72,13 +72,14 @@ def _next_window(self, i, seq_len, normalise):

def normalise_windows(self, window_data, single_window=False):
'''Normalise window with a base value of zero'''
eps = 0.00001
normalised_data = []
window_data = [window_data] if single_window else window_data
for window in window_data:
normalised_window = []
for col_i in range(window.shape[1]):
normalised_col = [((float(p) / float(window[0, col_i])) - 1) for p in window[:, col_i]]
normalised_col = [((float(p) / (float(window[0, col_i]) + eps) ) - 1) for p in window[:, col_i]]
normalised_window.append(normalised_col)
normalised_window = np.array(normalised_window).T # reshape and transpose array back into original multidimensional format
normalised_data.append(normalised_window)
return np.array(normalised_data)
return np.array(normalised_data)