Question
I am trying to select two out of 6 points in an array whose size is 6x3xn. These two points are not in the same row on each page as I am trying to select those two of the six points that meet a certain condition. Let's assume that condition is that every coordinate is between 0 and 30. Is there away to do this without loops?
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Expert Answer
Prashant Kumar
PhD Expert
Answered Nov 20, 2025
n = 2; X = randi(40, 6, 3, n)
X =
X(:,:,1) =
25 18 19
19 23 18
26 5 7
15 39 10
22 35 10
26 35 23
X(:,:,2) =
35 22 6
25 29 2
5 39 5
34 33 36
32 14 17
5 22 33
mask = all(X >= 0 & X <= 30, 2)
mask = 6×1×2 logical array
mask(:,:,1) =
1
1
1
0
0
0
mask(:,:,2) =
0
1
0
0
0
0
Y = reshape(X(cat(2, mask, mask, mask)), [], 3)
Y = 4×3
25 23 7
19 5 25
26 19 29
18 18 2
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