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Home/ Questions/Q 8985753
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Editorial Team
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Editorial Team
Asked: June 15, 20262026-06-15T21:23:41+00:00 2026-06-15T21:23:41+00:00

> which(LETTERS %in% c(R,A)) [1] 1 18 How can I get the answer 18

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> which(LETTERS %in% c("R","A"))
[1]  1 18

How can I get the answer 18 1 , i.e. the indices in the order that appear in the initial vector?

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  1. Editorial Team
    Editorial Team
    2026-06-15T21:23:42+00:00Added an answer on June 15, 2026 at 9:23 pm
    match(c("R","A"),LETTERS)
    
    [1] 18  1
    
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