What would be Julia code for the following R code:

a ← c(1:5)

b ← c(1:10)

c ← b[-a]

Thanks,

Patrik

What would be Julia code for the following R code:

a ← c(1:5)

b ← c(1:10)

c ← b[-a]

Thanks,

Patrik

I’m not an R expert, but you want the elements of `b`

which are NOT part of `a`

as well, right?

One way would be:

`c = Iterators.filter(x -> x ∉ a, b)`

(on lastest `master`

, if you’re on `0.5`

it would be `c = filter(x -> x ∉ a, b)`

).

Do you want `setdiff(b, a)`

?

I frequently use `b[setdiff(1:end, a)]`

.

3 Likes

Oh, has `filter()`

left Base? Must remember that…

As far as I understand, no. But it *has* moved into a module called `Iterators`

within `Base`

.

1 Like

NamedArrays implements a `Not`

method that does what the minus index does in R. I don’t know why a very common ideom like that is not in Julia Base though?

I made a PR for something like that in Base a long while back. Seems like a reasonable addition to me.

5 Likes

It’s funny to see that the branch is apparently still alive.

Thanks for your replies. setdiff() seems to be a work around, but that function is the same as %in% in R.