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我有这样的数据列表:如何用数据子集数据?
name Date
MANHATTAN STRIKER (V141) 30/11/2016
MANHATTAN STRIKER (V141) 16/11/2016
MANHATTAN STRIKER (V141) 26/10/2016
MANHATTAN STRIKER (V141) 28/9/2016
YOURTHEWONFORME (T258) 30/11/2016
YOURTHEWONFORME (T258) 9/11/2016
YOURTHEWONFORME (T258) 26/10/2016
FOREVER FUN (S130) 30/11/2016
FOREVER FUN (S130) 16/11/2016
FOREVER FUN (S130) 26/10/2016
FOREVER FUN (S130) 12/10/2016
如何我写R中的脚本只是列出每个名字,在每个日期最新的两个日期? 造成这样的:
name Date
MANHATTAN STRIKER (V141) 30/11/2016
MANHATTAN STRIKER (V141) 16/11/2016
YOURTHEWONFORME (T258) 30/11/2016
YOURTHEWONFORME (T258) 9/11/2016
FOREVER FUN (S130) 30/11/2016
FOREVER FUN (S130) 16/11/2016
尝试'库(dplyr); df1%>%group_by(name)%>%arrange(desc(as.Date(Date,“%d /%m /%Y”)))%>%slice(1:2)' – akrun
'dplyr :: top_n (Date,asDate(Date,'%d /%m /%Y'))%>%group_by(name)%>%top_n(2,Date)''方便:'df% – alistaire