On 14 February 2012 15:55, Jordi Gutiérrez Hermoso <jord...@octave.org> wrote:
> On 14 February 2012 10:35, Dr. Alexander Klein
> <alexander.kl...@math.uni-giessen.de> wrote:
>> >> accumulating results of repeated function evaluations (inject_into),
>> >
>> > accumarray?
>
>> Will this do something like
>
>> inject_into (@(x, y){x{:},rand(y)},num2cell(1:10),{})
>
> No, I suppose I misunderstood what you meant with "accumulate". But I
> don't find this function call more convenient than
>
> cellfun(@(x) rand(x), num2cell(1:10), "unif", 0);
>
> It seems like extra syntax for no additional benefit.
>
>> Really, all those functions are meant for the most part to provide
>> ways to get away without loops, maybe to avoid indexing errors along
>> the way, even when objects are complex, and predicates ignorant
>> about of (cell) arrays. Nothing more, and nothing less.
>
> But Octave already has ways to do this:
>
>
> http://www.gnu.org/software/octave/doc/interpreter/Vectorization-and-Faster-Code-Execution.html
>
>> I really liked the ease of use with collections in Smalltalk, but
>> then again I'm too nostalgic, maybe?
>
> This seems to be a bit too much like a square peg for a round hole.
> Octave is, somewhat intentionally, a very limited language. If you're
> trying to use Smalltalk message-passing in Octave, you will run into
> many frustrations. I still think that using reject and select instead
> of logical indexing is strange for Octave.
Maybe a note can be added to the help text of this functions later
explaining that this functions allow for ease of read/write for users
that are familiar with smalltalk but that logical indexing is a more
octavish approach that may have better performace?
Carnë
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