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Tensorial Principal Component Analysis in Detecting Temporal Trajectories of Purchase Patterns in Loyalty Card Data: Retrospective Cohort Study

Tensorial Principal Component Analysis in Detecting Temporal Trajectories of Purchase Patterns in Loyalty Card Data: Retrospective Cohort Study

The full details of the data collection process are described by Nevalainen et al [2]. The initial data on expenditure consisted of the purchases of 143 product groups of 14,595 consenting loyalty card holders, who were the primary card holders of their households.

Reija Autio, Joni Virta, Klaus Nordhausen, Mikael Fogelholm, Maijaliisa Erkkola, Jaakko Nevalainen

J Med Internet Res 2023;25:e44599