matlab help...distance/length

[freezingbum]

How do I find the distance between the two ones in this case?

M =

0
0
0
0
1
0
0
0
-1
0
0
0
1
0
0
0
-1
0
0
0


in this case the distance would be 8 but the number of zeros between will change...there will always be two 1's and two -1's..

[shwaip]

diff(find(a==1))

edit:

You should be able to write a for loop that calculates the difference, unless you really have no idea how to use matlab.