MATLAB Answers

Find first index that exceeds condition

27 views (last 30 days)
Jonathan Cheong
Jonathan Cheong on 25 Feb 2021
Commented: Jonathan Cheong on 25 Feb 2021
To elaborate and ensuring my questions are specific, I have a dataset and their index:
[1,2,3,4,5,6,7,8,9]
[1,4,8,0,0,1,9,0,3]
Say I would like to find the index and value of the 1st value > 2 after value (8)
Which means my desired output would look like this:
[7]
[9]
Normally, I would have a table of starting indices, but this is just a random sample to keep it short.
How do I code this?
Thanks.

Answers (1)

KALYAN ACHARJYA
KALYAN ACHARJYA on 25 Feb 2021
"I would like to find the index and value of the 1st value > 2 after value (8)"
Is this?
data=[1,4,8,0,0,1,9,0,3]
idx8=find(data==8)
idx=find(diff(data)<0)
result_idx=idx(idx>idx8(1))
Answer would be 7 only, can you verify again?
  2 Comments
Jonathan Cheong
Jonathan Cheong on 25 Feb 2021
The data won't be exactly 0 but it will be less than 2.
Hence the code should stop when the 1st value greater than 2 after the starting index is reached

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!