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

[Jaroslav Hajek]

On Fri, Jul 18, 2008 at 11:17 PM, Shaun Jackman <address@hidden> wrote:
> Jaroslav Hajek wrote:
>>
>> 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).
>
> How does octave know that the vector is of booleans and not integers? Where
> is this type information stored, and how do I display it?
>

Each high-level (i.e. not internal) value in Octave has type
information associated with it. You can use "class" and "typeinfo" to
inquire about the type.

> Cheers,
> Shaun
>



-- 
RNDr. Jaroslav Hajek
computing expert
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz