我有一个数据帧列表,例如
library(lubridate)
df1 = data.frame (Date = seq(ymd('2005-04-16'),ymd('2016-10-15'),by='day'),Station1423 = replicate(1,sample(0:130,4201,rep=TRUE)))
df2 = data.frame (Date = seq(ymd('2001-09-02'),ymd('2018-12-31'),Station4322 = replicate(1,6330,rep=TRUE)))
df3 = data.frame (Date = seq(ymd('1995-02-20'),Station1242 = replicate(1,8716,rep=TRUE)))
dflist = list(df1,df2,df3)
names(dflist) = c("df1","df2","df3")
我现在想为列表中的每个数据框提取季节。结果应该是这样的嵌套列表:
dflist list of 3
df1 list of 4
DJF: dataframe
..$Date
..$Station1423
JJA: dataframe
..$Date
..$Station1423
MAM: dataframe
..$Date
..$Station1423
SON: dataframe
..$Date
..$Station1423
df2 list of 4
DJF: dataframe
..$Date
..$Station4322
JJA: dataframe
..$Date
..$Station4322
.....and so on
我也可以接受这样的简单列表:
dflist list of 12
df1_DJF: dataframe
..$Date
..$Station1423
df1_JJA: dataframe
......