The SparseMatrixCSC type is immutable, which I understand to mean that I
must respect the types of the attributes of SparseMatrixCSC types, as well
as not changing the attributes themselves.
The following gives a loadError (type is immutable). I am confused that I
can modify the colptr and rowval attributes of A, but not the A.n
attribute. Why is this? I am trying to change the size of a sparse matrix
after removing the data from a row and column.
I have checked that both A.n and A.n - 1 are type Int.
function rmCol(A::SparseMatrixCSC, rmCol::Int)
colRmRange = A.colptr[rmCol]:(A.colptr[rmCol+1]-1)
filter!(e -> e != rmCol, A.colptr)
deleteat!(A.rowval, rowval[colRmRange])
deleteat!(A.nzval, colRmRange)
A.n -= 1 # inclusion of this line throws error
end
