MATLAB: Campare a row value with the next row

cell arraysequationfor loopif statementsubtract

Hi
I have the following column:
1
1
0
0
0
1
0
1
0
1
I want to campare rows value one by one with the next row ( first with second, second with third … and ninth with tenth) and check if it changes for 1 to 0, 0 to 0, 0 to 1 and 1 to 1. For each of these conditions, I want to count them. I tried using loop and diff or sign and equations but I could not work out because the results will be similar for two conditions.

Best Answer

You were close when using diff. You need to think what characterizes all four combinations. The code below should be what you need.
v=[1;1;0;0;0;1;0;1;0;1];
d=diff(v);
u=v(1:(end-1));%shrink by 1 to make it the same size as d
clc
%if [0;0]
%then diff==0, v==0
L= d==0 & u==0;
fprintf('[0 0]: %d\n',sum(L))
%if [0;1]
%then diff==-1
L= d==-1;
fprintf('[0 1]: %d\n',sum(L))
%if [1;0]
%then diff==1
L= d==1;
fprintf('[1 0]: %d\n',sum(L))
%if [1;1]
%then diff==0, v==1
L= d==0 & u==1;
fprintf('[1 1]: %d\n',sum(L))
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