考虑日期对数据框的列进行排序 - R

Question

I have a data frame (size:36 rows, 2000 columns), which in the last row it contains dates for each column in this format "YYYY-MM-DD" . How can I sort the columns using the dates in the last row? My attempts so far:

df[order(as.Date(df["Dates",], format="%Y-%m-%d")),] 
df[order(lubridate::ymd(df["Dates",])),]

Thanks

Answer 1

我们可以提取最后一行并执行order

df1[order(as.Date(unlist(tail(df1, 1))))]