Make two groups of data from a given data set

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Ali Akber
Ali Akber 2018-9-18
评论： jonas 2018-9-18
Hi,
I want to separate some specific data from a given data set. Suppose I have data set r i.e.
r = randi(99,1,500);
I want to make two groups of data based on following conditions
if r<=30 make group 1 (store them in an array)
if r>=35 make group 2 (store them in an array)
Any help in this regard will be highly appreciated.

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jonas
jonas 2018-9-18
编辑：jonas 2018-9-18
Just use logical indexing. Suppose you have a variable A that you want to group based on the values in r.
B{1}=A(r<=35);
B{2}=A(r>35);
Now you have split the array A and stored the sets in a cell array B. Of course, you can replace A by r, if r is the array you want to group.
Note that your signs were inconsistent.

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