Abstract
The study of high-dimensional data is becoming a common trend in modern research. Recently, stringing emerged as a methodology to treat high-dimensional sample vectors as realizations of smooth stochastic processes. Under the hypothesis of noisy and order-perturbed measurements, stringing introduces smooth transitions between predictors and takes advantage of Functional Data Analysis (FDA) to study the data. Once a functional representation is achieved, it is possible to visualize intrinsic patterns, or fit functional regression models.We propose manifold learning as an alternative to multidimensional scaling in the reordering step. In a simulation study we show that our proposal achieves smaller relative order errors, and that it can recover more complex relationships between predictors.
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Hernández-Roig, H.A., Aguilera-Morillo, M.C., Lillo, R.E. (2020). From High-dimensional to Functional Data: Stringing Via Manifold Learning. In: Aneiros, G., Horová, I., Hušková, M., Vieu, P. (eds) Functional and High-Dimensional Statistics and Related Fields. IWFOS 2020. Contributions to Statistics. Springer, Cham. https://doi.org/10.1007/978-3-030-47756-1_16
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DOI: https://doi.org/10.1007/978-3-030-47756-1_16
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