Moving window with two conditions - Matlab

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Ganesh Naik
Ganesh Naik le 6 Nov 2019
Commenté : Ganesh Naik le 30 Juil 2020
I have a time series data with the amplitude of the values range from 1 to 100. I need to use a moving window (10 seconds duration) and flag/highlight the segments of the data that falls with the threshold range of 91 to 97 for at least 10 seconds or more.
Any help in this regard is highly appreciated.
Thanks in advance
  2 commentaires
Ajay Kumar
Ajay Kumar le 6 Nov 2019
Having data would be helpful.
KALYAN ACHARJYA
KALYAN ACHARJYA le 6 Nov 2019
See diff with time series condition

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Réponses (1)

Ayush Gupta
Ayush Gupta le 5 Juin 2020
Try following this approach, it returns the regions in the moving window in between the defined thresholds:
% Define sample data and the threshold values.
A = count1.Data.';
threshold1 = 12;
threshold2 = 21;
moving_window = 10;
% Find logical vector where A>=hreshold1 and A<=threshold2
binaryVector = (A >= threshold1) & (A<=threshold2);
% Label each region with a label - an "ID" number.
[labeledVector, numRegions] = bwlabel(binaryVector);
% Measure lengths of each region and the indexes
measurements = regionprops(labeledVector, A, 'Area', 'PixelValues');
% Find regions where the area (length) is greater or equal to moving
% window and put the values into a cell of a cell array
ca = {};
for k = 1 : numRegions
if measurements(k).Area >= moving_window
ca{end+1} = measurements(k).PixelValues;
% Area (length) is greater or equal to moving window, so store the values.
end
end
% Display the regions that meet the criteria:
celldisp(ca)
  1 commentaire
Ganesh Naik
Ganesh Naik le 30 Juil 2020
Hi Ayush thanks for the answer. Could you please help me to plot these regions and shade them.

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