select certain matrix elements

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zilai si
zilai si on 15 Oct 2019
Edited: Fabio Freschi on 15 Oct 2019
hello,everyone
i just want to ask how to select eg the 1-10 and 20-30 rows elements in the first column.
like A(1:10 and 20:30,1)

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Accepted Answer

Fabio Freschi
Fabio Freschi on 15 Oct 2019
Edited: Fabio Freschi on 15 Oct 2019
You can simply concatenate your ranges using square brackets:
A([1:10 20:30],1)

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