How to remove certain elements in a matrix according to the value of elements in an array

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Hi all,
I want to manipulate a matrix according to the values in the first column. I want to remove rows which their values on the first column is less than 5. Here is an example
Original:
5 6
2 1
4 2
7 9
9 5
New matrix:
5 6
7 9
9 5

採用された回答

Voss
Voss 2022 年 6 月 20 日
A = [
5 6
2 1
4 2
7 9
9 5
]
A = 5×2
5 6 2 1 4 2 7 9 9 5
idx = A(:,1) < 5;
A(idx,:) = []
A = 3×2
5 6 7 9 9 5

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