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Variable out_vec must be of size [1 3]. It is currently of size [1 20]. Check where the variable is assigned a value.

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Raizel Lampert
Raizel Lampert 2021-7-27
评论： KSSV 2021-7-27
How can I reduce [1 20] size to a [1 3] size, without getting in the problem of needing only the number 1 10 and 20 in a vector row?

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KSSV
KSSV 2021-7-27
Ran in:
x = 1:20 ;
idx = sort(randperm(length(x),3)) ; % select randomly
x(idx)
ans = 1×3
3 6 8

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