R 按初始顺序获取索引
我如何才能得到答案，即索引在初始向量中出现的顺序R 按初始顺序获取索引,r,R,我如何才能得到答案，即索引在初始向量中出现的顺序 > which(LETTERS %in% c("R","A")) [1] 1 18 match(c("R","A"),LETTERS) [1] 18 1
> which(LETTERS %in% c("R","A"))
[1] 1 18
match(c("R","A"),LETTERS)
[1] 18 1
R 按初始顺序获取索引
我如何才能得到答案，即索引在初始向量中出现的顺序R 按初始顺序获取索引,r,R,我如何才能得到答案，即索引在初始向量中出现的顺序 > which(LETTERS %in% c("R","A")) [1] 1 18 match(c("R","A"),LETTERS) [1] 18 1
> which(LETTERS %in% c("R","A"))
[1] 1 18
match(c("R","A"),LETTERS)
[1] 18 1