How to separate data sets/clusters that got saved in a single data file?
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I have this follwing data. Col 1: Vertical Pixels, Col 2: Horizontal Pixels, Col 3: Index of 256x256 pixels, Col 4: Data 1, Col 5: Data 2. When I plot Col 3 and Col 5 (as shown in the figure) using 'imagesc', there appear two seprate clusters each containing a part of values from Col 5. My question is how do I extract the data or columns correponding to each cluster without visualizing it. Any leads will be highly appreciated. Many thanks.
9 77 19464 410575406 13
15 73 18446 410575406 11
17 74 18704 410575406 12
12 77 19467 410575406 17
9 76 19208 410575408 1
16 74 18703 410575406 13
11 77 19466 410575406 31
10 77 19465 410575406 21
16 73 18447 410575406 34
15 74 18702 410575406 80
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Cris LaPierre
2023-5-16
kmeans clustering algorithm?
data = [9 77 19464 410575406 13
15 73 18446 410575406 11
17 74 18704 410575406 12
12 77 19467 410575406 17
9 76 19208 410575408 1
16 74 18703 410575406 13
11 77 19466 410575406 31
10 77 19465 410575406 21
16 73 18447 410575406 34
15 74 18702 410575406 80]
img = zeros(256);
img(data(:,3)) = data(:,5);
imagesc(img)
xlim([68 82])
ylim([7 20])
idx = kmeans(data(:,1:2),2);
figure
gscatter(data(:,2),data(:,1),idx)
axis image
axis ij
xlim([68 82])
ylim([7 20])
4 个评论
Cris LaPierre
2023-5-19
Without having the actual data, it's hard to say for certain what would work. You have something working, wich is great. My next thought would be to look into some image processing techinques, like blob analysis perhaps?
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