find first and last index below threshold in a vector

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Guilherme Theis
Guilherme Theis 2020-6-29
回答： dpb 2020-6-29
Hello,
I've a vector of s-parameters results that contains >1000 elements. I want to mesure the bandwidth of the impedance matching of my circuit. My vector has a bunch of negative values and I want to see the intervals where those values are below -10.
I want to see the first index below -10 and the last one of an given interval. Meaning that if for example I have -10 between the points 130 and 200 I want to have a results to be FirstIndex = 130, LastIndex = 200.
How can I accomplish this in R2020a?

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dpb
dpb 2020-6-29
Use find

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