Matrix manupulation to get specific index

I have a matrix like this.

1 1 1
1 9 1
0 1 0

With my central value being 9 and i would like to find all the values which are 0 and thier location that surrounds my central value.

In that way i have my results being (3, 1) and (3, 3)

Is there a function that can do this?

Answer 1

[Jon]

You can use the MATLAB find function for this. For example:

% Define your matrix
A = [1 1 1;1 9 1;0 1 0];

% use find function with two return arguments giving row and column indices where match occurs
[rIdx,cIdx] = find(A == 0);

% display the results by putting them into a matrix where each row gives the row and column indices 
% in the original matrix where the elements have a value of zero
result = [rIdx cIdx];
disp(result)