r - Concatenating Two Vectors to a New Vector -

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i trying combine 2 vectors create new vector. tried (well, similar this).

y <- c(10,10,11,11) m <- c(1,2,1,2) <- data.frame(m,y) paste(my[1], my[2], sep = "")

i this: 

# [1] "c(1, 2, 1, 2)c(10, 10, 11, 11)"`

i same thing when use collapse instead of sep.

i trying get: 

# ["1 10","2 10","1 11","2 11"]

try of following instead:

paste(my[[1]], my[[2]]) # [1] "1 10" "2 10" "1 11" "2 11"  paste(my[, 1], my[, 2]) # [1] "1 10" "2 10" "1 11" "2 11"  paste(my$m, my$y) # [1] "1 10" "2 10" "1 11" "2 11"  do.call(paste, my) # [1] "1 10" "2 10" "1 11" "2 11"

the problem weren't selecting values in column, rather, single-column data.frame.

of course, use original vectors:

> paste(m, y) [1] "1 10" "2 10" "1 11" "2 11"

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