MATLAB: How to insert a disc and centered around the dot

Question

Hi,

I have A = zeros(100,100) materix which I added a while pixel (dots) in this zeros materix randomly. I have also another disc materix as follows

disk = strel('disk', 10);

D = disk.Neighborhood;

what I want to do is insert the disc and centered around the pixel ( white pixel)

Answer 1

A(appropriate_row:appropriate_row+99, appropriate_column:appropriate_column+99) = ...
    A(appropriate_row:appropriate_row+99, appropriate_column:appropriate_column+99) | D;