Hello,

I have these two matrices:

```
julia> L
1×1 Array{Float64,2}:
3.0
julia> M
2×1 Array{Float64,2}:
2.0
1.0
```

I do:

```
import LinearAlgebra
d = 3
Ctilde = hcat(vcat(L,M), vcat(zeros(size(L,1),d-size(L,1)), LinearAlgebra.Diagonal(ones(d-size(L,1)))))
```

Then my matrix `Ctilde`

is a sparse matrix:

```
julia> Ctilde
3×3 SparseArrays.SparseMatrixCSC{Float64,Int64} with 5 stored entries:
[1, 1] = 3.0
[2, 1] = 2.0
[3, 1] = 1.0
[2, 2] = 1.0
[3, 3] = 1.0
```

Why? How can I directly get an ordinary matrix? (by “directly”, I mean without getting this sparse matrix and then converting it).