CODEWITHSUNDEEP
julia
sbac
sbac

Reputation: 2081

How to delete an array in an array of arrays in Julia

I created the 3D array me that contains three 2D arrays. I want to delete for example the 2nd array [:,:,2] and copy the result to a new array called you.

I tried deleteat!(me, :,:,2) but it gives me an error.

me = reshape(1:(5*5*3), 5, 5, 3)

Upvotes: 3

Views: 182

Answers (1)

jling
jling

Reputation: 2301

First of all, a 3-tensor is not an array of arrays, Julia has built-in N-dimensional array support.

Since you've recognized that you can't do this without copying (precisely why deleteat!() doesn't work), the simplest way to do this is:

julia> me[:,:,[1,3]]
5×5×2 Array{Int64, 3}:
[:, :, 1] =
 1   6  11  16  21
 2   7  12  17  22
 3   8  13  18  23
 4   9  14  19  24
 5  10  15  20  25

[:, :, 2] =
 51  56  61  66  71
 52  57  62  67  72
 53  58  63  68  73
 54  59  64  69  74
 55  60  65  70  75

Other ways to systematically excluding index can be found at: Exclude elements of Array based on index (Julia)

Upvotes: 6

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