closest index in matrix between two values

hello, i have 2d matrix for example:

 X = [0 0 0 0 0;
      1 1 1 1 1;
      0 1 2 1 0;
      1 1 1 1 1;
      0 0 0 0 0]

i want to get closest index of columns and rows between value 2 and 0. Is there any chance to do this??

Regards

[Azzi Abdelmalek]

are you looking for two values?

[df df]

i want index of value 0 which is closest to index of value 2 which means i want to get index (3,1) (1,3) (5,3) and (3,5) bcs they are only 2 cells away

Answer 1

[Stephen23]

X = [0 0 0 0 0;
    1 1 1 1 1;
    0 1 2 1 0;
    1 1 1 1 1;
    0 0 0 0 0];

[R0,C0] = find(X==0);
[R2,C2] = find(X==2);
Rm = bsxfun(@minus,R0,R2.');
Cm = bsxfun(@minus,C0,C2.');
% Xd = abs(Rm) + abs(Cm);
Xd = sqrt(Rm.^2 + Cm.^2);     % this could probably be improved.
[R,~] = find(Xd==min(Xd(:))); % and a tolerance might be useful here...

and the indices of the zeros closest to the two are:

>> [R0(R),C0(R)]
ans =
   3     1
   1     3
   5     3
   3     5

[df df]

thanks a lot!!

Answer 2

[José-Luis]

   X = [0 0 0 0 0;
        1 1 1 1 1;
        0 1 2 1 0;
        1 1 1 1 1;
        0 0 0 0 0];

   [tx,ty] = find(X==2);
   x_dist = abs(tx-(1:size(X,1)));
   y_dist = abs(ty-(1:size(X,2)))';
   dist_array = bsxfun(@plus,x_dist.^2,y_dist.^2);
   [ix,iy] = find(dist_array == min(dist_array(X==0)))

Answer 3

[Andrei Bobrov]

z =  bwdist(X == 2).*(X == 0);
[ii,jj] = find(z == min(z(z~=0)));

[Stephen23]

Note: requires the Image Processing Toolbox.

[Andrei Bobrov]

Hi Stephen! MATLAB without Image... whot is it? :)