I have a matrix of k-vectors, how can I get a k-vector of matrices?

```
k = 5
julia> m = reshape([rand(k) for _ in 1:6], 2,3)
2×3 Matrix{Vector{Float64}}:
[0.428997, 0.769875, 0.441121, 0.467842, 0.596864] … [0.722121, 0.742541, 0.31471, 0.276913, 0.981706]
[0.0145858, 0.0981856, 0.684633, 0.982405, 0.89112] [0.291437, 0.398135, 0.237457, 0.688412, 0.719319]
```