Boolean Vector Length Calculation

Hi all,

I have a vector consisting of booleans, either 1 or 0. Such as {0 0 0 0 1 1 1 0 0 0 0 0 1 1 0 0 0 0}. 1 values by itself cannot be in between of 0s. The same rule is valid also for 0s. I need the length of 1s separately. In other words, I do not want to know the length of all 1s. Instead, what I look for is the length of each 1s accumulated inside the vector independently. How can I find the length of 1s via matlab?

Thank you in advence.

Answer 1

[Adam Danz]

The vector 'oneCounts' is a list of consecutive 1 counts. It's empty if there are no 1s.

tf = [0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 0 0 0 0 1 1 1 0 0 1 1 1 1]; 
df = diff([0, tf, 0]);   %if tf is a column: diff([0;tf;0])

oneCounts = find(df == -1) - find(df == 1)

oneCounts =
     3     2     3     4

[Oguz Altunkas]

Thank you so much, it helped alot.

Kind Regards

[Adam Danz]

Glad I could help!