Split data into groups

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Happy Bear
Happy Bear 2020-6-3
评论： Happy Bear 2020-6-3
Hi,
How can I split data into 3 groups? For example, if I have 300 values, I want 100 lowest values in 1 group, 100 highest values in 1 group and the in-between values in another group.
Thank you

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Stephan
Stephan 2020-6-3
编辑：Stephan 2020-6-3
A = randi(5000,300,1); % random data
A = sortrows(A); % sort it
low = A(1:100); % just use indexing now
mid = A(101:200);
high = A(201:300);

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