LU is theoretically lower if you have a faster matrix multiply.
Otherwise it is about 2n^3/3 + n^2 + n/3, I think.
On Wed, Sep 7, 2011 at 9:26 PM, Greg Sterijevski gsterijev...@gmail.comwrote:
I thought that QR is of O(n^3) complexity, while LU is probably in the
vicinity of O(n^2.5). While
Hi,
this question was raised while working on MATH-659, which I quote
{quote}
In rev1166533, I removed the call to this method in
AdamsNordsieckTransformer.initializeHighOrderDerivatives(double,
double[], double[][], double[][]). This raises one important question.
All across the package
+1 :)
On Wed, Sep 7, 2011 at 12:54 PM, Gary Gregory garydgreg...@gmail.com wrote:
On Wed, Sep 7, 2011 at 2:42 PM, sebb seb...@gmail.com wrote:
On 7 September 2011 19:26, Gary Gregory garydgreg...@gmail.com wrote:
Hi All:
The message for the exception thrown by Validate.isInstance does
On Tue, Sep 6, 2011 at 8:16 AM, s...@apache.org wrote:
Author: sebb
Date: Tue Sep 6 15:16:47 2011
New Revision: 1165701
URL: http://svn.apache.org/viewvc?rev=1165701view=rev
Log:
LANG-744 StringUtils throws java.security.AccessControlException on Google
App Engine
Change static code to
On 9/7/11 6:34 AM, Gilles Sadowski wrote:
Hi.
In class AbstractLeastSquaresOptimizer (in
o.a.c.m.optimization.general),
the method getCovariances() uses LUDecompositionImpl to compute the
inverse of a matrix.
In my application, this leads to a SingularMatrixException. If I change
On 9/7/11 1:07 PM, Ted Dunning wrote:
Does the LUDecomposition not use pivots?
Yes
LU should always do so since it is
numerically unstable otherwise. I would be surprised if it doesn't given
the normal level of quality in commons math.
QR is, of course, almost always preferable to LU as
On 9/7/11 9:26 PM, Greg Sterijevski wrote:
I thought that QR is of O(n^3) complexity, while LU is probably in the
vicinity of O(n^2.5). While this is not a barn burning improvement, it is an
improvement. Consider that if you are using the covariance of the parameters
in deciding how to make
Hi Simone,
many thanks for your support, but there seems to be a different problem.
I did run mvn site:site before. Obviously maven does not know where to
deploy the site.
Well, it is possible to copy the site per hand to its location at
people.apache.org. I was also able to adapt the
To whom it may engage...
This is an automated request, but not an unsolicited one. For
more information please visit http://gump.apache.org/nagged.html,
and/or contact the folk at gene...@gump.apache.org.
Project commons-configuration has an issue affecting its community integration.
HA! gotcha!
the distributionManagement section is missing in the Configuration
pom, what you need is adding
distributionManagement
!-- Cannot define in parent ATM, see COMMONSSITE-26 --
site
idpeople.apache.org/id
nameApache Commons Site/name
To whom it may engage...
This is an automated request, but not an unsolicited one. For
more information please visit http://gump.apache.org/nagged.html,
and/or contact the folk at gene...@gump.apache.org.
Project commons-proxy-test has an issue affecting its community integration.
This
The Apache Commons team is pleased to announce the availability
of Commons Configuration 1.7.
The Commons Configuration software library provides a generic
configuration interface which enables an application to read
configuration data from a variety of sources, e.g. properties files, XML
If speed is not a factor, why not do the best thing and calculate the
eigenvalue decomposition and then form a moore-penrose inverse. The
inversion will never fail (unless all eigenvalues are zero). You will also
have an immediate diagnostic of the stability of the system (through the
condition or
Hi.
In revision 1166674, I've added an argument to that exception so that it can
print the value that failed the test.
However, I also wonder whether the message should not be
---CUT---
not positive definite matrix: diagonal element at ({1},{1}) is not strictly
larger than {2} ({0})
---CUT---
Now in SVN :)
Gary
On Thu, Sep 8, 2011 at 2:22 AM, Henri Yandell flame...@gmail.com wrote:
+1 :)
On Wed, Sep 7, 2011 at 12:54 PM, Gary Gregory garydgreg...@gmail.com
wrote:
On Wed, Sep 7, 2011 at 2:42 PM, sebb seb...@gmail.com wrote:
On 7 September 2011 19:26, Gary Gregory
Cholesky, in my opinion, is not robust as you have discovered. When it
encounters a non-psd matrix it gives up. Maybe that is the correct course of
action, but I still think that when you are using the getCovariance to
estimate the curvature in the neighborhood of a point it would be okay to
take
On 8 September 2011 10:54, Simone Tripodi simonetrip...@apache.org wrote:
HA! gotcha!
the distributionManagement section is missing in the Configuration
pom, what you need is adding
distributionManagement
!-- Cannot define in parent ATM, see COMMONSSITE-26 --
site
On 8 September 2011 07:42, Henri Yandell flame...@gmail.com wrote:
On Tue, Sep 6, 2011 at 8:16 AM, s...@apache.org wrote:
Author: sebb
Date: Tue Sep 6 15:16:47 2011
New Revision: 1165701
URL: http://svn.apache.org/viewvc?rev=1165701view=rev
Log:
LANG-744 StringUtils throws
Rank revealing Cholesky should be effectively about as good as an eigen
solution. The pivoting results in non-increasing diagonals and a sharp rank
indicator. You can do pseudo inverse things with the result as well.
Getting the actual pseudo inverse isn't a bad thing. I just don't see it as
Could you be contaminating the cross product matrix when you do your
accumulation? I noticed one of the utility classes has methods for doing
safe accumulations. I know that this was part of the problem when I was
trying to estimate the Wampler data with the MillerRegression. Just a
thought...
On
I offer the Mahout implementation from MAHOUT-792 (not yet committed) as a
reference that does pivoting and has a settable threshold. It also uses
vectorized view operations to avoid touching the internal representation if
that helps.
On Thu, Sep 8, 2011 at 8:22 AM, Gilles Sadowski
Hi!
Perhaps we should add an example section to Commons Parent, but
commented out, and a note to say it should be included in component
POMs?
+1 I think it would be helpful!
s/sote/site/
hehehe, in Italian we say the rush wants the calm, typed too hurry :P
Simo
Since the diagonal elements are heavily modified during the Cholesky
decomposition, it isn't clear what these actually mean.
With pivoting, the meaning of these is even less clear.
Also, I thought that the test for non-positive definiteness was whether the
diagonal element after reduction from
On 8 September 2011 16:07, sebb seb...@gmail.com wrote:
On 8 September 2011 07:42, Henri Yandell flame...@gmail.com wrote:
On Tue, Sep 6, 2011 at 8:16 AM, s...@apache.org wrote:
Author: sebb
Date: Tue Sep 6 15:16:47 2011
New Revision: 1165701
URL:
Am 08.09.2011 17:40, schrieb Simone Tripodi:
Hi!
Perhaps we should add an example section to Commons Parent, but
commented out, and a note to say it should be included in component
POMs?
+1 I think it would be helpful!
Agreed. This is a good idea.
Oliver
s/sote/site/
hehehe, in
Hi all,
The proposal of making the 2.0-work brach as proper codebase in /trunk
for the [chain] component passes with 3 +1 binding votes from
* Simone Tripodi
* James Carman
* Matt Benson
no other votes have been casted.
I'm going to move the current trunk in a 1.X branch, and the 2.0-work in
Here's my +1 non-binding.
On Thu, Sep 8, 2011 at 1:38 PM, Simone Tripodi simonetrip...@apache.org wrote:
Hi all,
The proposal of making the 2.0-work brach as proper codebase in /trunk
for the [chain] component passes with 3 +1 binding votes from
* Simone Tripodi
* James Carman
* Matt
great, looking forward for more contributions Paul!!!
thanks a lot, have a nice day!
Simo
http://people.apache.org/~simonetripodi/
http://www.99soft.org/
On Thu, Sep 8, 2011 at 8:46 PM, Paul Benedict pbened...@apache.org wrote:
Here's my +1 non-binding.
On Thu, Sep 8, 2011 at 1:38 PM,
Le 08/09/2011 08:07, Sébastien Brisard a écrit :
Hi,
this question was raised while working on MATH-659, which I quote
{quote}
In rev1166533, I removed the call to this method in
AdamsNordsieckTransformer.initializeHighOrderDerivatives(double,
double[], double[][], double[][]). This raises one
Le 08/09/2011 09:15, Phil Steitz a écrit :
On 9/7/11 6:34 AM, Gilles Sadowski wrote:
Hi.
In class AbstractLeastSquaresOptimizer (in o.a.c.m.optimization.general),
the method getCovariances() uses LUDecompositionImpl to compute the
inverse of a matrix.
In my application, this leads to a
On Thu, Sep 8, 2011 at 12:42 PM, Luc Maisonobe luc.maison...@free.frwrote:
... Luc - are there other reasons that QR would be better for cov
matrices? I would have to play with a bunch of examples, but I
suspect with the defaults, Cholesky may do the best job detecting
singular problems.
On Tue, Sep 6, 2011 at 9:39 AM, Simone Tripodi simonetrip...@apache.org wrote:
Hi Niall,
thanks for the hint!
Anyway (DISCLAIMER: I'm putting in the original chain author's shoes,
so I couldn't say the truth) I immagine that users would be interested
on having, as a Context, not just a place
Hi Niall!!!
ok I got you, sounds that instead of improving we put a step down on
the Context.
What is in your opinion the better way to manage the Context,
replacing it with with Map and using generics?
We thought String as a key maybe because influenced by some usecases,
but as you already told
On Wed, Sep 7, 2011 at 1:26 PM, Gary Gregory garydgreg...@gmail.com wrote:
Should LockableFileWriter.close() be changed from:
public void close() throws IOException {
try {
out.close();
} finally {
lockFile.delete();
}
to:
public boolean
To whom it may engage...
This is an automated request, but not an unsolicited one. For
more information please visit http://gump.apache.org/nagged.html,
and/or contact the folk at gene...@gump.apache.org.
Project commons-configuration has an issue affecting its community integration.
On Wed, Sep 7, 2011 at 6:10 AM, Gary Gregory garydgreg...@gmail.com wrote:
On Wed, Sep 7, 2011 at 12:22 AM, Ralph Goers
ralph.go...@dslextreme.comwrote:
Why is the idea plugin defined? IntelliJ hasn't needed it in a long time.
Good question.
Should we get rid of it?
+1
The warning at
On Thu, Sep 08, 2011 at 09:36:47AM -0700, Ted Dunning wrote:
Since the diagonal elements are heavily modified during the Cholesky
decomposition, it isn't clear what these actually mean.
With pivoting, the meaning of these is even less clear.
Also, I thought that the test for non-positive
Hi Niall,
The source of the misunderstanding regarding the usage of chain may be
my fault. Thank you very much for piping up and letting us know some
of the history regarding the chain project.
I was under the assumption that all keys of a Context were String
because in ContextBase in the
On 7 September 2011 03:23, Gary Gregory garydgreg...@gmail.com wrote:
Hi All:
It feels like it's about time to vote on releasing version 22?
Idea has been removed; Clirr has been added; comments have been updated.
I think the only remaining issue is with the bundle plugin, which
keeps
On 9 September 2011 00:36, sebb seb...@gmail.com wrote:
On 7 September 2011 03:23, Gary Gregory garydgreg...@gmail.com wrote:
Hi All:
It feels like it's about time to vote on releasing version 22?
Idea has been removed; Clirr has been added; comments have been updated.
I think the only
OK.
Replace that with the correct value. I meant it to be an index.
That doesn't change my other points. There is an inherent problem with
less than comments when you have subtracted several other elements
previously and only now notices that the remainder is less than some other
adjusted
On Fri, Sep 9, 2011 at 12:25 AM, Elijah Zupancic eli...@zupancic.name wrote:
Hi Niall,
The source of the misunderstanding regarding the usage of chain may be
my fault. Thank you very much for piping up and letting us know some
of the history regarding the chain project.
I was under the
Hi Luc,
thanks for your detailed explanations attached to the MATH-659. I'm
worried about the changes I have applied to the code, now. Here is
what I've done. I've replaced the following line
{code}
return new Array2DRowRealMatrix(decomposition.getSolver().solve(b), false);
{code}
with
{code}
Why doesn't solve just return a RealMatrix? Why does it insist on returning
an Array2DRowRealMatrix?
Does the user really care?
2011/9/8 Sébastien Brisard sebastien.bris...@m4x.org
Hi Luc,
thanks for your detailed explanations attached to the MATH-659. I'm
worried about the changes I have
Sorry Ted, I was not very clear in my explanations.
solve does return a RealMatrix. Internally, it builds BlockRealMatrix, though.
The issue is that Luc needs the underlying double[][] array in this
ODE application. This you could easily get if the returned matrix were
a Array2DRowRealMatrix, and
Gilles,
Is the test checked in? I am interested in looking at it.
Thank you,
-Greg
On Thu, Sep 8, 2011 at 2:51 PM, Ted Dunning ted.dunn...@gmail.com wrote:
On Thu, Sep 8, 2011 at 12:42 PM, Luc Maisonobe luc.maison...@free.fr
wrote:
... Luc - are there other reasons that QR would be
I agree with Ted. You sometimes run into this issue with psuedoinverses. You
discover a zero eigenvalue at index i. The user's natural inclination is to
attribute it to the corresponding column of the data matrix.
-Greg
On Thu, Sep 8, 2011 at 6:55 PM, Ted Dunning ted.dunn...@gmail.com wrote:
Hello All,
I am seeing this. My build is on a Mac. Does anyone have any clues?
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-site-plugin:3.0-beta-3:site (default-site) on
project commons-math: failed to get Reports: Unable to parse configuration
of mojo
I know some people have gotten maven 3 to work, but I think most [math]
developers use maven 2. That's what I use at least. You might try that.
Phil
On Sep 8, 2011, at 9:19 PM, Greg Sterijevski gsterijev...@gmail.com wrote:
Hello All,
I am seeing this. My build is on a Mac. Does anyone
Okay will do. My primary computer died, so I moved to a Mac. Its a bit of
learning curve, even coming from linux.
Thank you,
-Greg
On Thu, Sep 8, 2011 at 11:58 PM, Phil Steitz phil.ste...@gmail.com wrote:
I know some people have gotten maven 3 to work, but I think most [math]
developers use
FWIW, I built the commons vfs site with Maven 3 and didn't have any issues.
On Sep 8, 2011, at 10:00 PM, Greg Sterijevski wrote:
Okay will do. My primary computer died, so I moved to a Mac. Its a bit of
learning curve, even coming from linux.
Thank you,
-Greg
On Thu, Sep 8, 2011 at
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