On Mar 9, 2010, at 1:28 AM, Per Vognsen wrote:
> Which is preferable depends on the nature of the changes that your
> matrices will undergo. For dense linear algebra, it's common for most
> of a matrix to change with every operation. Hence you won't reap any
> benefits from the persistence of Clo
By the way, I also noticed your logic is wrong. It should be (+ (* i
ncol) j) rather than (* i j).
-Per
On Tue, Mar 9, 2010 at 2:57 AM, Jonathan Shore wrote:
> Hi,
> I'm still trying to work out the best way to deal with operations on
> heterogenous data in clojure. I have a complex applicatio
It looks like the new (deftype ..) may be what I am looking for in
terms of binding heterogenous state efficiently. The matrix function
was just a test case for how to bind state efficiently. Thanks for
all of the responses.
On Mar 8, 2:57 pm, Jonathan Shore wrote:
> Hi,
>
> I'm still trying
On Mar 9, 2010, at 2:41 AM, Per Vognsen wrote:
> By the way, I also noticed your logic is wrong. It should be (+ (* i
> ncol) j) rather than (* i j).
>
> -Per
Thanks -- I was just trying to explore how to deal with heterogeneous data.
No plans to build my own matrix lib. Thanks for spotti
Which is preferable depends on the nature of the changes that your
matrices will undergo. For dense linear algebra, it's common for most
of a matrix to change with every operation. Hence you won't reap any
benefits from the persistence of Clojure's maps.
The problem with your first implementation
On 9 March 2010 06:57, Jonathan Shore wrote:
> the second because maps clearly are not "near the metal"
maps are actually very very efficiently implemented. Small maps are
especially efficient as they are implemented as array maps.
user=> (type {:a 1, :b 2})
clojure.lang.PersistentArrayMap
At te
Hi,
I'm still trying to work out the best way to deal with operations on
heterogenous data in clojure. I have a complex application which has such
requirements. I wrote a simple toy matrix as a means to explore closure
versus map based implementations. Note that in this case the "data str
