Re: MathLink and SparseArray
- To: mathgroup at smc.vnet.net
- Subject: [mg65866] Re: MathLink and SparseArray
- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
- Date: Wed, 19 Apr 2006 04:54:30 -0400 (EDT)
- Organization: Uni Leipzig
- References: <e1sv36$cq1$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi, you can try to get the rules that correspond to the sparse array and pass the rules to your C-Program. Regards Jens <jmartinezv at yahoo.com> schrieb im Newsbeitrag news:e1sv36$cq1$1 at smc.vnet.net... | [This post has been delayed due to email problems - moderator] | | | Hi there, | | I have been using mathematica and C++ for analyising Markov processes, | mostly | represented with sparse matrices. So far, I've been | exporting/importing the matrices | into a file to pass the information between mathematica and programs in | c++. | I am using external code due to performance reasons. | | Is there any way I can avoid the exporting/importing process by, for | example, | using a non-documented function like MLGetRealSparseArray..., or any | way of | accessing the internal representation of the SparseArray (compressed | row format)? | | The matrices i am working with are square and very sparse (<1% | non-zero) but | with millions of entries... | | many thanks in advance for any advice, | | J.M.Martinez | Ph.D. student at University of Twente, the Netherlands. |