Assign moving window average if 50 % of the values in the window are within a threshold

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nlm 2020-4-15

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回答： David Hill 2020-4-17

Hi,

While doing a moving window average, if the 50 % values in that window are less than a certain threshold, how can one assign NaN to the average over that window.

   mvavg = movmean(temp_ms, [left_window right_window],'omitnan',...
                       'Endpoints', 'discard'); 

How should I check for the threshold over the window ?

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darova 2020-4-17

在 MATLAB Online 中打开

What about this?

a = [1 2 3 4 4 0 2 1]
a>3

And the result

a =
     1     2     3     4     4     0     2     1
ans =
     0     0     0     1     1     0     0     0

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Answer 1

David Hill 2020-4-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/518217-assign-moving-window-average-if-50-of-the-values-in-the-window-are-within-a-threshold#answer_426661

在 MATLAB Online 中打开

threshold=5;%whatever you want your threshold to be
threshold2= ;%window size/2
mvavg = movmean(temp_ms, [left_window right_window],'omitnan',...
                       'Endpoints', 'discard'); 
mvsum = movsum(temp_ms<threshold, [left_window right_window],'omitnan',...
                       'Endpoints', 'discard'); 
mvavg(mvsum<threshold2)=nan;

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Assign moving window average if 50 % of the values in the window are within a threshold

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Assign moving window average if 50 % of the values in the window are within a threshold

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