How to use columns indexing

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Alex castilla 2018-4-5

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https://ww2.mathworks.cn/matlabcentral/answers/392841-how-to-use-columns-indexing

关闭： MATLAB Answer Bot 2021-8-20

Hello everybody,

I have a small question and I was wondering if someone could help me out! I have a matrix (2617x2) with two columns Time and Velocity represented here in this graph. The red line is a threshold of the velocity. The departures and the stops are calculated using the velocity (if velocity < 36 then “stop”; if velocity >36 then “departure”).

Now, I would like to know calculate the stops time and the departures time. I suppose I could use columns indexing but i don’t know how.

thanks!!