R function for testing if a vector contains a given element -

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In R, how do you see a vector, to see if there is an element in it?

both mail () (first shows) and % In% (a ',' b ',' c ',' e ')' b 'in% v% 

  v < ## Return Match ('B', V) ## In this situation, 'B' returns the first position: 2   / Pre>

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