detecting no. of events

2 次查看（过去 30 天）

Heartrin 2015-11-5

评论： Heartrin 2015-11-5

I have an array of 2000x1 = D .

i have a condition D>25. for D>25 higher than 20 sec i should count 1 event.

how can i do this in matlab?

Thorsten 2015-11-5

编辑：Thorsten 2015-11-5

If D contains an entry every second, you can use:

 D = randi(2000, 1, 20); % sample data
 di = diff([0 D > 25 0]);
 i1 = find(di == 1);
 i2 = find(di == -1);
 Nevents = nnz(i2 - i1 > 20);

Thorsten 2015-11-5

What's the size of D? If it is 20000x1 as you said in your original post, then it should work. If it is 1x20000, you have to use

di = diff([0; D > 25; 0]);

Heartrin 2015-11-5

Thanks . you are awesome.

MATLAB Language Fundamentals Data Types Numeric Types Logical

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

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

Translated by