Algebra common utilities

diageye(::Type{T}, n::Int)

An alias for the Matrix{T}(I, n, n). Returns a matrix of size n x n with ones (of type T) on the diagonal and zeros everywhere else.

diageye(n::Int)

An alias for the Matrix{Float64}(I, n, n). Returns a matrix of size n x n with ones (of type Float64) on the diagonal and zeros everywhere else.