Time Series Data 편집하기 (부분)

==Overview==
Time series data captures how a variable evolves over time. The primary characteristic of time series data is its temporal ordering, meaning that the order of the observations is essential for analysis. Unlike cross-sectional data, time series data emphasizes trends, seasonality, and patterns that unfold over time.

Key characteristics:
*Each observation is indexed by a timestamp or time interval.
*The data may exhibit trends, seasonality, or cyclic patterns.
*Time dependencies are inherent, meaning past values influence future values.