Definition

Noun: A time series is a sequence of data points, typically consisting of successive measurements made over a uniform time interval. It is used to analyze trends, patterns, or behaviors of a specific variable as it evolves through time.

Usage

A time series is used to track and analyze how a particular metric changes over regular periods. It is a fundamental concept in fields like statistics, economics, finance, and signal processing. - The primary purpose of a time series is to facilitate forecasting, monitoring, and understanding temporal dynamics.

Examples

• The economist analyzed a time series of monthly unemployment rates to identify cyclical patterns.
• Creating a time series of daily temperature readings is essential for climate modeling.
• Stock prices are often presented as a time series on financial charts.

Advanced Usage

• Time series analysis: The process of using statistical techniques to model and extract meaningful characteristics from time series data.
  • Time series analysis revealed a strong seasonal component in the retail sales data.
• Time series forecasting: The use of a model to predict future data points based on previously observed values in the time series.
  • Time series forecasting is crucial for inventory management and demand planning.

Variants and Related Words

• Time-series data (noun phrase): Data structured in the form of a time series.
  • The sensor collects time-series data every second.
• Time-series model (noun phrase): A mathematical model describing the underlying structure of a time series.
  • The ARIMA model is a popular time-series model.

Synonyms

• Chronological data sequence
• Temporal data set

Related Concepts (Not Phrasal Verbs or Idioms)

• Trend: A long-term progression (upward, downward, or stationary) in a time series.
• Seasonality: Regular, predictable fluctuations in a time series that recur over specific periods (e.g., yearly, quarterly).
• Stationarity: A property of a time series where its statistical characteristics (like mean and variance) are constant over time.

Noun

1. a series of values of a variable at successive times