Depending on the latter, the references can be classified into two main categories: Fixed basis. The most commonly used basis in this context are the Fourier , the B-spline  and the Wavelet .Data-driven basis. Two main basis computed from the data are used in the literature: the most parsimonious one is given by the functional principal components [19, 20] and the one that maximizes the covariance among the response and the functional predictor uses the functional partial least square components (PLS) [21, 22].