R-Retrieve Data (step 1)

[I]Data Structure 1.vector numeric > a<-c(1,2,3) > a [1] 1 2 3 character > a<-c("1","2","3") > a [1] "1" "2" "3" logicals > a<-c(FALSE,TRUE) > a [1] FALSE TRUE scalar > a<-FALSE > a [1] FALSE 2.

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