How to convert a 1D array to tuple in Julia?

Question

I want to reshape an array in Julia using the reshape function but the shape of the new array is stored as a 1-D array itself. reshape takes tuples as argument but not 1D array.

For example, I want to be able to do this:

reshape([1 2 3 ; 4 5 6],(3,2))

but using [3,2] instead of (3,2) as the input to the shape parameter. Converting array [3,2] to tuple (3,2) seems like the obvious thing to do, but if that can't be done, maybe I need to write another reshape function?

Any advice is appreciated.

score 2 · Accepted Answer · answered Dec 01 '19 at 16:42

2

You can splat the array:

julia> reshape([1 2 3 ; 4 5 6], [3,2]...)
3×2 Array{Int64,2}:
 1  5
 4  3
 2  6

answered Dec 01 '19 at 16:42

carstenbauer

9,817
1
27
40

Thanks! Exactly what I need! – truedichotomy Dec 01 '19 at 17:24
or - in other use cases when splatting would not be allowed `Tuple(array)` creates a tuple from an array. – Bogumił Kamiński Dec 01 '19 at 21:50
@BogumiłKamiński That solution also works great. Thanks! I wish Julia documentation mentions that as a constructor method for tuples. – truedichotomy Dec 02 '19 at 04:45

score 1 · Answer 2 · answered Dec 02 '19 at 11:19

1

function array2tuple(a::Array)
   (a...,)
end

answered Dec 02 '19 at 11:19

Steven Siew

843
8
11

How to convert a 1D array to tuple in Julia?

2 Answers2