A time series is a dataset that tracks a sample over time and most of the articles about this series work on a specific/particular level of aggregation. But in the real world and many applications, there are multiple time series that are hierarchically organized. The related datasets have several levels is based on geography, branches, or other features and challenges start when we try to observe the information while focusing on the more granular level. A hierarchical time series is a hero for this situation.

But what is the hierarchical time series?

HTS is a collection of time series that…

Ceyda Akbulut

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