Problem: extracting a row from an array, returns a column

[heliosdrm]

The quick way of obtaining what you want is:

julia> N[[1],:]
1×2 Array{Int64,2}:
 1  2

I,e. instead of giving a scalar index, pass a collection of indices for slicing, like when you do N[1:2,:] - although that collection has only one index.

Longer explanation of why is it like that in a recent discussion:

Trouble Understanding Slicing

In the following code, I can’t understand why sum(a[1,:],dims=2) gives a different answer then the first row of sum(a[1:2,:],dims=2). julia> a = [1 2 3 4; 5 6 7 8; 9 10 11 12]; julia> sum(a, dims=2) 3×1 Array{Int64,2}: 10 26 42 julia> sum(a[1:2,:], dims=2) 2×1 Array{Int64,2}: 10 26 julia> sum(a[1,:], dims=2) 4-element Array{Int64,1}: 1 2 3 4 julia>