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Re: extracting rows in a matrix
From: |
Francesco Potorti` |
Subject: |
Re: extracting rows in a matrix |
Date: |
Wed, 13 May 2009 08:12:28 +0200 |
> it doesn't work:
>octave:16> extract_row = rand(nrows,1) < 0.2
>extract_row =
>
> 0
> 0
> 0
> 0
> 0
>
>octave:17> B = A(extract_row, :)
>B = [](0x4)
It does work. You chose nrows=5, which in many cases gives you a choice
of zero rows, as in this particular case. Try many times with nrows=5,
and look at the results. Also, try with a bigger nrows.
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