AUCTransformer.py

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from ._CustomTransformer import _CustomTransformer
 
import numpy as np 
 
 
class AUCTransformer(_CustomTransformer):
    ''' Area under the curve normalization '''
 
    def __init__(self, wavelengths, *args, **kwargs): 
        self.wavelengths = wavelengths
    
    def _transform(self, X, *args, **kwargs):     
        area = np.trapz(X, self.wavelengths, axis=1)[:, None]
        return X/area#np.append(X / area, area, 1)