How to insert a disc and centered around the dot?

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

[Walter Roberson]

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

[Sara]

Thank you for your reply,

it shows erros

A(rmax:rmax+99, cmax:cmax+99) = A(rmax:rmax+99, cmax:cmax+99)| D

Index in position 1 exceeds array bounds (must not exceed 100).

Here is the mterixs that I used in the code:

A =zeros(100,100);

random_row = round(rand*100)

random_col = round(rand*100)

A (random_col, random_row)=1

disk = strel('disk', 10);

D = disk.Neighborhood;

but does shwo erros when I applied your comments.

[Walter Roberson]

The +99 should be +9

Protection needs to be added for the case that the location is near an edge.

[Sara]

Thank you for your reply. I did fix this as you says. it should be less than the disc raduis which is 10 in my case.