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Counting consecutive negative numbers in an array

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BN
BN on 24 Nov 2020
Commented: BN on 24 Nov 2020
Hello, I need to find how many times consecutive negative numbers are in the array. For example:
v = [11 2 3 -1 -2 1 -1 -1 -3 1 3 -1];
The answer must be: 3
Thank you

Accepted Answer

Bruno Luong
Bruno Luong on 24 Nov 2020
Edited: Bruno Luong on 24 Nov 2020
length(strfind([false v<0],[0 1]))
or
sum(diff([false v<0])==1)
  3 Comments
BN
BN on 24 Nov 2020
Thank you so much. I forgot to use the clear command then try the code. After that, your code works very well.
Thank you it is really helpful for me

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