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hello everyone. How to divide a group of points named data into two parts, dataA and dataB, as shown in the figure. Thank you very much.

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Stephan
Stephan 2021년 6월 2일
편집: Stephan 2021년 6월 2일
% divide data
idx = clusterdata(data,2);
dataA = data(idx==2,:);
dataB = data(idx==1,:);
% plot results
scatter(dataA(:,1),dataA(:,2))
hold on
scatter(dataB(:,1),dataB(:,2))
hold off
result is:
Note that this needs Statisitcs and Machine Learning Toolbox.
  댓글 수: 3
Wesley
Wesley 2021년 6월 2일
It is very helpful to me. Thank you for your warm-hearted reply.

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추가 답변(1개)

KSSV
KSSV 2021년 6월 2일
x = data(:,1) ;
y = data(:,2) ;
mx = mean(x) ; my = mean(y) ;
idx = y < my ;
x1 = x(idx) ; y1 = y(idx) ;
x2 = x(~idx) ; y2 = y(~idx) ;
plot(x,y,'.r')
hold on
plot(mx,my,'*b')
plot(x1,y1,'.b')
plot(x2,y2,'.g')

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