R中一段时间的平均价格

Question

我开始接触 R，而且我对时间序列概念是全新的。

我有时间范围为 200 年的面板数据，我想计算每个城市 10 年内的 price_average，但我找不到将其适当地塑造成函数的方法。

> all_cities
    month price year     town
110    10  2625 1699   Munich
111    11  2730 1699   Munich
112    12  2782 1699   Munich
113     1    34 1700 Hannover
114     1  2520 1700   Munich
115     2    34 1700 Hannover
116     2  2730 1700   Munich
117     3    33 1700 Hannover
118     3  2765 1700   Munich
119     4    36 1700 Hannover
120     4  3150 1700   Munich

我正在寻找以下形式的 return 数据框：

> all_cities_10y
    s.year e.year mean_price    town
1     1690  1699    xxx         Munich
2     1700  1709    xxx         Munich
3     1700  1709    xxx         Hannover

稍后我想在图表中显示数据。但是，我希望问题很清楚。我感谢任何建议。

structure(list(month = c(1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 
7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 1, 1, 2, 2, 3, 3, 4
), price = c(34, 2520, 34, 2730, 33, 2765, 36, 3150, 36, 3150, 
36, 3097, 36, 3675, 24, 3360, 23, 2205, 20, 2152, 21, 2520, 21, 
2520, 21, 2590, 21, 2567, 24, 2415, 24), year = c(1700, 1700, 
1700, 1700, 1700, 1700, 1700, 1700, 1700, 1700, 1700, 1700, 1700, 
1700, 1700, 1700, 1700, 1700, 1700, 1700, 1700, 1700, 1700, 1700, 
1701, 1701, 1701, 1701, 1701, 1701, 1701), town = c("Hannover", 
"Munich", "Hannover", "Munich", "Hannover", "Munich", "Hannover", 
"Munich", "Hannover", "Munich", "Hannover", "Munich", "Hannover", 
"Munich", "Hannover", "Munich", "Hannover", "Munich", "Hannover", 
"Munich", "Hannover", "Munich", "Hannover", "Munich", "Hannover", 
"Munich", "Hannover", "Munich", "Hannover", "Munich", "Hannover"
)), row.names = 113:143, class = "data.frame")

Answer 1

这可能对你有用... 我使用了你问题中的数据（见底部答案），但没有使用提供的样本数据，因为它只包含 1700-1709 区间内的年份。

library( data.table )
#make it a data.table if not already
setDT( DT )
#summarise
DT[, .(mean_proce = mean(price) ), 
   by = .(s.year = floor(year/10)*10,
          e.year = 9 + floor(year/10)*10,
          town )]

#    s.year e.year     town mean_proce
# 1:   1690   1699   Munich   2712.333
# 2:   1700   1709 Hannover     34.250
# 3:   1700   1709   Munich   2791.250

使用的示例数据

DT <- fread("    month price year     town
    10  2625 1699   Munich
    11  2730 1699   Munich
    12  2782 1699   Munich
     1    34 1700 Hannover
     1  2520 1700   Munich
     2    34 1700 Hannover
     2  2730 1700   Munich
     3    33 1700 Hannover
     3  2765 1700   Munich
     4    36 1700 Hannover
     4  3150 1700   Munich")

R中一段时间的平均价格

Average price of a time period in R

r

mean

panel-data

R中一段时间​​的平均价格

Average price of a time period in R

r

mean

panel-data

R中一段时间的平均价格