Efficient indexing. Index array generating.

data and array1 are given. I am looking for a more efficient way to generate index. It should be a one-liner.

Thanks in Advance!

  


    data = 1:1000;
    
    array1 = 1:10:101
    array2 = array+2
    
    index = [];
    for i = 1: numel(array1)
        index = [index; array1(i):array2(i)];
    end
    
    data2 = data(index)

Answer 1

[Stephen23]

data = 1:1000;
array1 = 1:10:101

array1 = 1×11

1 11 21 31 41 51 61 71 81 91 101

idx = array1(:)+(0:2);
out = data(idx)

out = 11×3

1 2 3 11 12 13 21 22 23 31 32 33 41 42 43 51 52 53 61 62 63 71 72 73 81 82 83 91 92 93

[Christian Tieber]

smooth