[boost] Re: 2-dimensional container (grid)

From: Jason D Schmidt (jd.schmidt_at_[hidden])
Date: 2002-09-10 21:18:34

I do a lot of computational physics, and I think a grid-type class might
be really useful.  I work with a lot guys who use Matlab, but I'd like to
see similar numerical support (particularly 2+ dimensional arrays) in C++
because its language, library, and performance is far superior to Matlab.
 What advantages does the grid class have over Boost's multi-array?

Also, as an open question for any authority on Boost's multi-array, what
does the multi-array provide in the way of numerical support (maybe as
opposed to uBLAS)?  How well does it integrate with STL (much better than
std::valarray<T>, I hope)?

Jason Schmidt
jd.schmidt_at_[hidden] 

--Original Message------------------------------------

Date: Thu, 5 Sep 2002 18:38:09 -0700
From: "Garrett Jones" <alkaline_at_[hidden]>
To: <boost_at_[hidden]>
Subject: [boost] query: interest in 2-dimensional container (grid)
 
I've been watching the list for a couple days, and i was wondering if
there
was interest in a 2-dimensional container template class, which would be
called "grid". It is possible to make a 2-dimensional grid with vectors,
but
all of the internal vectors have to be resized independently and they
would
all be in different locations of memory. The grid template would have a
single area in memory for the contents, and data could be accessed as if
it
were a 2-dimensional array:
 
grid<int> vGrid;
vGrid.resize(3,3);
vGrid[2][2] = 0;
 
This is done by using a surrogate class, gridrow. Passing it to functions
is
also easy:
 
void dosomething(grid<int> &rGrid);
 
dosomething(vGrid);
 
I already have the basics working and have used it successfully in a
couple
(one-user) programs. So, if there is interest, what do i do to prepare it
for submission? Also, are there already template classes available
somewhere
with this type of functionality?
--
Garrett Jones
http://www.alkaline.org
 
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