regex - Pasting character vectors, removing NA's and separators between NAs -

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i've got several character vectors want paste together. problem of character vectors pretty sparse. so, when paste them, na's , separators. how can efficiently remove na's , separators while still joining vectors?

i've got like:

n1 = c("goats", "goats", "spatula", na, "rectitude", "boink") n2 = c("forever", na, "...yes", na, na, na) cbind(paste(n1,n2, sep=", "))

which gives me:

[1,] "goats, forever"  [2,] "goats, na"       [3,] "spatula, ...yes" [4,] "na, na"          [5,] "rectitude, na"   [6,] "boink, na"

but want:

[1,] "goats, forever"  [2,] "goats"           [3,] "spatula, ...yes" [4,] <na> [5,] "rectitude"       [6,] "boink"

there inefficient , tedious ways of doing lot of regular expressions , string splitting. quick/simple?

not lot of regex, 1 line , 1 more replace na

n1 <- c("goats", "goats", "spatula", na, "rectitude", "boink") n2 <- c("forever", na, "...yes", na, na, na) n3 <- cbind(paste(n1,n2, sep=", ")) n3 <- gsub("(, )?na", "", n3) n3[n3==""] <- na

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