Finding consecutive zeros in an array. Not able to solve using diff command

25 vues (au cours des 30 derniers jours)
I have an array like below
a=[0 0 1 1 -1 0 0 0 1 1 1 -1 0 0 1 -1] %in my actual code, there are many elements
There is a -1 after every set of 1s like an end marker. I want to find the largest number of consecutive zeros present. Here it would be 3.
I used diff(a) but in this case even 1-1=0 along with 0-0=0. I also tried manipulating the array with some math operations and then using diff(a) but no use.
Any idea on how to do this?

Réponse acceptée

Stephen23
Stephen23 le 24 Oct 2021
a = [0,0,1,1,-1,0,0,0,1,1,1,-1,0,0,1,-1];
d = diff([false,a==0,false]);
b = find(d>0);
e = find(d<0);
m = max(e-b)
m = 3
  1 commentaire
Andreia Gomes
Andreia Gomes le 15 Sep 2022
Hello!
How can I do the same, but using a matrix with several rows and columns?
Thank you!

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Plus de réponses (1)

Matt J
Matt J le 24 Oct 2021
Modifié(e) : Matt J le 24 Oct 2021
  1 commentaire
Jaya
Jaya le 24 Oct 2021
This works perfectly fine too. But I accepted the other answer as that code is smaller and I used it.

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