Re: Java Class for SVD of large sparse matrix (say 50,000 x 50,000) ?

Article View: comp.lang.java.help

Article #38

Back to comp.lang.java.help Previous Next

#38

From: Jim Sculley
Date: Sun, 20 Jun 2004 01:15

21 lines
2149 bytes

David Johnson wrote:
> Hello,
> 
> What I am after is a GNU or similarly licensed class that will perform
> Singular Value Decomposition on fairly large matrices (I'm experimenting
> with Latent Semantic Analysis).
> 
> The Matrix Toolkit for Java (MTJ) http://www.math.uib.no/~bjornoh/mtj/ has a
> SVD function, but that only seems to work up to about 1000 x 1000 elements
> (with ~1GB RAM).  The Sparse Matrix Toolkit (SMT)
> http://www.math.uib.no/~bjornoh/mtj/smt/ sounds promising, but hasn't got
> SVD as a method.


Actually, it does.

http://www.mi.uib.no/~bjornoh/mtj/doc/mt/fact/SingularvalueComputer.html

Jim S.
-- 
Remove my extraneous mandibular appendages to reply via email.

Technical Details

Message-ID: <qMGdnU5bSNiYeEndRVn-gw@comcast.com>

Path:

arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!news.glorb.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local1.nntp.dca.giganews.com!nntp.comcast.com!news.comcast.com.POSTED!not-for-mail

References: <cb1dbn$2orm$1@otis.netspace.net.au>

Show Full Headers

Complete Article Headers

X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 113ae9,470a26ef63ebd57f
X-Google-Thread: 10d67e,470a26ef63ebd57f
X-Google-Attributes: gid113ae9,gid10d67e,public
Path: arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!news.glorb.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local1.nntp.dca.giganews.com!nntp.comcast.com!news.comcast.com.POSTED!not-for-mail
NNTP-Posting-Date: Sat, 19 Jun 2004 20:14:45 -0500
Date: Sat, 19 Jun 2004 21:15:01 -0400
From: Jim Sculley <niceguyj@wisdomteeth.comcast.net>
User-Agent: Mozilla Thunderbird 0.5 (X11/20040208)
X-Accept-Language: en-us, en
MIME-Version: 1.0
Newsgroups: comp.lang.java.help,aus.mathematics
Subject: Re: Java Class for SVD of large sparse matrix (say 50,000 x 50,000)
 ?
References: <cb1dbn$2orm$1@otis.netspace.net.au>
In-Reply-To: <cb1dbn$2orm$1@otis.netspace.net.au>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Message-ID: <qMGdnU5bSNiYeEndRVn-gw@comcast.com>
Lines: 21
NNTP-Posting-Host: 24.99.59.108
X-Trace: sv3-RUxV2fjUX24QWaycP/cBGl5TT2sKVH8EGiHSn0y6rloqqf4QhxpTCzTphgTzydB8oUXPk4fMuzCHOyq!bhaNcJ6xr+TmBy2bRGMjVlK8qfKsMVZFIjiqtWvOpH8ICdShjJnntK/OU/kb
X-Complaints-To: abuse@comcast.net
X-DMCA-Complaints-To: dmca@comcast.net
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly
X-Postfilter: 1.1

Reply to Parent Message