R 中的时间序列数据处理
Harrison Brown
Graduate Researcher in Geography
滚动窗口：
扩展窗口：
递增的窗口宽度：
可用数据的汇总是什么？
固定起点：
R 中的扩展窗口：
zoo::rollapply()
width
扩展窗口宽度：
1
2
3
4
生成数列的函数：
base::seq_along()
seq_along(daily_temp)
[1] 1 2 3 4 5 6 7 8 9 ... ... 363 364 365
exp_widths <- seq_along(daily_temp) exp_widths
[1] 1 2 3 4 5 ... 363 364 365
temp_expand <- rollapply( data = daily_temp, FUN = mean, width = exp_widths, # Alignment must be 'right' align = 'right' )
ggplot() + # Original data geom_line(data = daily_temp, aes(x = Index, y = daily_temp), color = 'grey50') + # Expanding window plot geom_line(data = temp_expand, aes(x = Index, y = temp_expand), color = 'red') + theme_light() + labs(y = 'Degrees Celsius')
ggplot() + # Original data geom_line(data = daily_temp, aes(x = Index, y = daily_temp), color = 'grey50') +
# Expanding window plot geom_line(data = temp_expand, aes(x = Index, y = temp_expand), color = 'red') + theme_light() + labs(y = 'Degrees Celsius')
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