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Re: How to leave out selected elements from a vector?
From: |
Jaroslav Hajek |
Subject: |
Re: How to leave out selected elements from a vector? |
Date: |
Fri, 18 Jul 2008 21:42:00 +0200 |
On Fri, Jul 18, 2008 at 7:07 PM, Shaun Jackman <address@hidden> wrote:
> Bill Denney wrote:
> ...
>> or with a logical vector
>> mask = false(size(list));
>> mask(m:n) = true;
>> list(mask)
>
> Woah! This blows my mind. How does a logical vector differ from a vector of
> integers? Example:
>
Indexing by a boolean vector b is essentially the same as indexing by find (b).
> octave:18> true(size(x))
> ans =
>
> 1 1 1
>
> octave:19> ones(size(x))
> ans =
>
> 1 1 1
>
> octave:20> x(true(size(x)))
> ans =
>
> 1 2 3
>
> octave:21> x(ones(size(x)))
> ans =
>
> 1 1 1
>
> My head doth explode.
>
> Cheers,
> Shaun
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>
--
RNDr. Jaroslav Hajek
computing expert
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz
- How to leave out selected elements from a vector?, Primoz PETERLIN, 2008/07/17
- Re: How to leave out selected elements from a vector?, Michael Goffioul, 2008/07/17
- Re: How to leave out selected elements from a vector?, Francesco Potorti`, 2008/07/17
- Re: How to leave out selected elements from a vector?, Shaun Jackman, 2008/07/18
- Re: How to leave out selected elements from a vector?,
Jaroslav Hajek <=
- Re: How to leave out selected elements from a vector?, Shaun Jackman, 2008/07/18
- Re: How to leave out selected elements from a vector?, Jaroslav Hajek, 2008/07/18
- Re: How to leave out selected elements from a vector?, Ben Abbott, 2008/07/18
- Re: How to leave out selected elements from a vector?, Francesco Potorti`, 2008/07/18