滞后与差分
案例研究：在 R 中分析城市时间序列数据
Lore Dirick
Manager of Data Science Curriculum at Flatiron School
滞后
lag()将观测值按时间滞后
lag(unemployment, k = 1, ...)
差分
diff()计算相邻期的变化
diff(unemployment, lag = 1, ...)
案例研究：在 R 中分析城市时间序列数据
Lore Dirick
Manager of Data Science Curriculum at Flatiron School
lag() 将观测值按时间滞后lag(unemployment, k = 1, ...)
diff() 计算相邻期的变化diff(unemployment, lag = 1, ...)
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