Re: How to leave out selected elements from a vector?

[Jaroslav Hajek]

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