finding adjacent value in a matrix

Hi, I have a portion of a matrix as follows:

I =

     0     1     0     0     1     0
     0     0     0     1     0     0
     0     0     0     0     0     0
     0     0     1     1     0     0
     0     1     0     0     1     0
     1     0     0     0     0     1

I know the position of two 1s i.e (6,1) and (6,6). I need to know whether this two 1s are connected and if connected the positions of all 1s from first 1 to last 1. connected means any of eight neighbor of 1st 1 has 1,any of eight neighbor of 1st 1's neighbor has value 1 and it ends at 1 at (6,6) Here (1,2) and (1,5) is not connected but (6,1) and (6,6) are connected

Answer 1

[Walter Roberson]

bwlabel() and then regionprops . If the labels differ for the two positions then they are not connected; if they are connected, then the pixel list from regionprops will show the path, provided there are no "spurs".