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Improve noteworthy differences from R on ismissing #29332

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Sep 24, 2018
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Improve noteworthy differences from R on ismissing #29332

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3 changes: 2 additions & 1 deletion doc/src/manual/noteworthy-differences.md
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Expand Up @@ -182,7 +182,8 @@ For users coming to Julia from R, these are some noteworthy differences:
* Julia does not support the `NULL` type. The closest equivalent is [`nothing`](@ref), but it
behaves like a scalar value rather than like a list. Use `x === nothing` instead of `is.null(x)`.
* In Julia, missing values are represented by the [`missing`](@ref) object rather than by `NA`.
Use [`ismissing(x)`](@ref) instead of `isna(x)`. The [`skipmissing`](@ref) function is generally
Use [`ismissing(x)`](@ref) (or `ismissing.(x)` for element-wise operation on vectors) instead of
`is.na(x)`. The [`skipmissing`](@ref) function is generally
used instead of `na.rm=TRUE` (though in some particular cases functions take a `skipmissing`
argument).
* Julia lacks the equivalent of R's `assign` or `get`.
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