余弦分析采用最小二乘法，以适应一个正弦波的时间序列。余弦分析通常用于生物时间序列分析，演示predictible的节奏。这种方法可用于一个不平等的间隔时间序列。-Cosinor analysis uses the least squares method to fit a sine wave to a

time series. Cosinor analysis is often used in the analysis

of biologic time series that demonstrate predictible rhythms. This

method can be used with an unequally spaced time series.