Dear Nafise,

Your question is a python related question. You can find the answer in any python documentation or forum.

So please, make an effort and search around you or by a quick check on internet before posting a question in the kwant forum.

In fact, posting non kwant related questions in this forum, makes it a general forum rather than a specialized one.

So for your question if A is a matrix, the elements are A[i,j].

Example A=array([[1,2],[3,4]]) gives A[0,0]=1.

I hope this helps,

Ade

On Sat, Dec 7, 2019 at 8:26 AM Nafise Nouri <nafise.nour@gmail.com> wrote:

Dear all,

Is there any one to know how we can use one element of matrix? For example we have matrix A as follows:

A=[2 4;6,0]

We have A matrix with dimension 2*2. If we want to use one element of matrix such as A(2,1), (that is number 6 in the matrix), How we can write in kwant? Any help appreciate.

Best,
Nafise