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Home/ Questions/Q 6530019
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Editorial Team
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Editorial Team
Asked: May 25, 20262026-05-25T09:42:19+00:00 2026-05-25T09:42:19+00:00

a = [1 2; 3 4; 5 6] I want to extract the first

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a = [1 2; 3 4; 5 6] I want to extract the first and third row of a, so I have x = [1; 3] (indices of rows).

a(x) doesn’t work.

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  1. Editorial Team
    Editorial Team
    2026-05-25T09:42:20+00:00Added an answer on May 25, 2026 at 9:42 am

    Like this: a([1,3],:)

    The comma separates the dimensions, : means “entire range”, and square brackets make a list.

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