通过键返回值 [英] Return value by key

问题描述

是否有更短的方法按键(由key元素给定)按顺序返回值?

Is there a shorter way to return the values by key in the order, which is given by elements of key?

vars<-c("a"=1,"b"=2)
key<-c("b","a")
ret<-c()
for(k in key)
ret<-c(ret,vars[names(vars) %in% k])
ret

推荐答案

我认为intersect对您可能有用...

I think intersect could be useful to you...

vars[ intersect(key,names(vars)) ]
#b a 
#2 1

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