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math.ST2026
A Theory of Nonparametric Covariance Function Estimation for Discretely Observed Data
Yoshikazu Terada, Atsutomo Yara
We study nonparametric covariance function estimation for functional data observed with noise at discrete locations on a -dimensional domain. Estimating the covariance function…
math.ST2024
Some notes on the -means clustering for missing data
Yoshikazu Terada, Xin Guan
The classical -means clustering requires a complete data matrix without missing entries. As a natural extension of the -means clustering for missing data, the -POD cluster…