“…By combining the above bounds T 0,N , T 1,N and T 2,N , summing over i ∈ I in T 0,N and over i 1 , i 2 ∈ I in T 1,N and T 2,N , and using (10), we arrive at (8), thus completing the proof. …”
We propose a method to select the bandwidth for functional time series prediction. The idea underlying this method is to calculate the empirical risk of prediction using past segments of the observed series and to select as value of the bandwidth for prediction the bandwidth which minimizes this risk. We prove an oracle bound for the proposed bandwidth estimator showing that it mimics, asymptotically, the value of the bandwidth which minimizes the unknown theoretical risk of prediction based on past segments. We illustrate the usefulness of the proposed estimator in finite sample situations by means of a small simulation study and compare the resulting predictions with those obtained by a leave-one-curve-out cross-validation estimator used in the literature.
“…By combining the above bounds T 0,N , T 1,N and T 2,N , summing over i ∈ I in T 0,N and over i 1 , i 2 ∈ I in T 1,N and T 2,N , and using (10), we arrive at (8), thus completing the proof. …”
We propose a method to select the bandwidth for functional time series prediction. The idea underlying this method is to calculate the empirical risk of prediction using past segments of the observed series and to select as value of the bandwidth for prediction the bandwidth which minimizes this risk. We prove an oracle bound for the proposed bandwidth estimator showing that it mimics, asymptotically, the value of the bandwidth which minimizes the unknown theoretical risk of prediction based on past segments. We illustrate the usefulness of the proposed estimator in finite sample situations by means of a small simulation study and compare the resulting predictions with those obtained by a leave-one-curve-out cross-validation estimator used in the literature.
“…The same thing is done, with more explicit details, along the proof of Lemma 4.5 in [2]. Precisely, as indicated on p. 339 of [2], the compact set is written in such a way that, for any l > 0,…”
“…On the other hand, more and more works deal with nonparametric approaches for variables valued in an infinite dimensional space. Gasser et al [6] proposed an estimate of the mode of a distribution of random curves whereas Ferraty et al [3] studied a kernel estimator in the functional regression setting. Note also that a kernel estimator for functional conditional distribution has been introduced by Ferraty et al [5].…”
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