If you have an array of arrays, you can join them into a 2d array as follows: a = fill(ones(10), 10) A = hcat(a...) How can you do the reverse?

Thanks. I assumed this was a duplicate question but couldn’t find a relevant thread. In short, the solution is: [A[:, i] for i in 1:size(A, 2)] Edit: Thanks @DNF

Since Julia 1.1, we also have eachrow for this.

If the Columns are short, consider reinterpret to reinterpret the matrix as an array off SVectors.

The inverse of hcat would be eachcolumn or [A[:, i] for i in 1:size(A,2)]. BTW, reduce(hcat, a) is preferable to splatting for efficiency reasons.

Split 2d array into array of 1d arrays

General Usage

braamvandyk September 16, 2019, 5:44am 2

I did this some time ago as well. Have a look here for the code with some community builds.

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Split 2d array into array of 1d arrays

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