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\examples{
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\examples{
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DF <- data.frame(x = c(1, 2, 3), y = c(0, 10, NA))
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DF <- data.frame(x = c(1, 2, 3), y = c(0, 10, NA))
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na.omit(DF)
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na.omit(DF)
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m <- as.matrix(DF)
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m <- as.matrix(DF)
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na.omit(m)
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na.omit(m)
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stopifnot(all(na.omit(1:3) == 1:3))  # does not affect objects with no NA's
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stopifnot(na.omit(1:3) == 1:3)  # does not affect objects with no NAs
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try(na.fail(DF))   #> Error: missing values in ...
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try(na.fail(DF))   #> Error: missing values in ...
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options("na.action")
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options("na.action")
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}
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}
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\keyword{NA}
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\keyword{NA}