MATLAB: How to find neighbor matrix

matrix

This is some code i write:
for i=1:h   %h=height of the image

   for j=1:w %w=width of image

       if (i,j)==1  %1 is the border

           if (i,j-1) ~=1 && if(i,j+1) ~=1
           table(j-1,j+1) =1
           table(j+1,j-1) =1 
 for j=1:w %w=width of image
   for i=1:h   %h=height of the image
         if (j,1)==1  %1 is the border
             if (j,i-1) ~=1 && if(j,i+1) ~=1
             table(i-1,i+1) =1
             table(i+1,i-1) =1
I hope loop horizontal and vertical to find the neighbor matrix dont care of diagonal situation.
As long as it read x then read 1 then read y then (x,y) and(y,x)=1
How to solve this?
A=
  1 1 1 1 1 1 1 1 1 1
  1 2 2 1 3 3 1 4 4 1 
  1 2 2 1 3 1 5 5 5 1
  1 1 1 1 1 1 1 1 1 1
result=
     2 3 4 5
  2  1 1 0 0 
  3  1 1 1 1
  4  0 1 1 1
  5  0 1 1 1

Best Answer

table = (A == 1);
s = max(size(table,1),size(table,2));
if s ~= size(table,1) || s ~= size(table,2)
   table(s,s) = false;    %make it square
end
table = table | table.';    %make it symmetric
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