How to do if statement for a specific value that lasts for more than 2 seconds

Question

Saad Alqahtani 2021-7-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/875623-how-to-do-if-statement-for-a-specific-value-that-lasts-for-more-than-2-seconds

评论： Saad Alqahtani 2021-7-9

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Hi,

I'm trying to see if a specific value exists for more than 2 seconds.

here is my code:

isOK2 = (Discard2_to_end <=Discard2value); % logical array
t = 2*fsamp; % 2 seconds interval

I want to use if statement if 1 exists for more than 2 seconds.

Any help would be appreciated. Thanks in advance.

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Answer 1

Walter Roberson 2021-7-9

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/875623-how-to-do-if-statement-for-a-specific-value-that-lasts-for-more-than-2-seconds#answer_743763

在 MATLAB Online 中打开

isOK2 = reshape(isOK2, 1, []);  %need row vector
starts = strfind([0, isOK2], [0 1]);
stops = strfind([isOK2, 0], [1 0]);
burst_duration = stops - starts + 1;
burst_is_long_enough = burst_duration >= t;
starts = starts(burst_is_long_enough);
stops = stops(burst_is_long_enough);

starts and stops will now be vectors of starting and ending indices of places with bursts that were long enough. They will be empty if there were no sufficiently long bursts.