maybe C++ and not "C" ? (was Re: function space)

[Sergei Steshenko]

--- On Tue, 2/21/12, CdeMills <address@hidden> wrote:

> From: CdeMills <address@hidden>
> Subject: Re: function space
> To: address@hidden
> Date: Tuesday, February 21, 2012, 2:26 PM
> 
[snip]
> 
> For instance, I prefer R which makes a clear difference
> between function
> calls and array indexing. The price to pay is that the
> concatenation
> operator is not available, as it was "taken" for array
> indexing, and is
> replaced by the function "c", abbreviation of cat.
> 
> OTOH, I'm porting a Octave program to C in order to run it
> on an embedded
> platform. And I may assure you that the m-languages has some
> issues, but at
> least operators works on vector and matrices. A single line
> like
> x = y(some condition on y) % x and y are vectors
> is translated in many lines:
> - malloc an array of size (y), and test if the result is OK
> - loop on y, test the condition, fill the temporary array
> - count the number of non-null elements in the temporary
> array
> - free x memory
> - allocate x memory with the count you've computed (and test
> it)
> - loop on the temp vector, find the non-null elements, use
> their index to
> access y; concatenate the results in x
> - do not forget to free the temp array
> 
> So yes there are a few flaws in the m-language, but you gain
> development
> speed, compactness, no need to declare variables, memory is
> managed for you,
> ...
> 
> Regards
> Pascal
> 
> --
> View this message in context: 
> http://octave.1599824.n4.nabble.com/function-space-tp4408021p4408551.html
> Sent from the Octave - General mailing list archive at
> Nabble.com.
>

Though I'm not a fan of C++, I must admit it does have some advantages over "C".

For what you are doing maybe the following:

http://arma.sourceforge.net/
http://eigen.tuxfamily.org/index.php?title=Main_Page

are useful. There are more similar projects, I remember just those two off the 
top of my head.

...

Does 'boost' library have matrix classes ?

Regards,
  Sergei.