Displaying 20 results from an estimated 2000 matches similar to: "Fast trace of inverse"
2008 Mar 12
3
Types of quadrature
Dear R-users
I would like to integrate something like \int_k^\infty (1 - F(x)) dx, where F(.) is a cumulative distribution function. As mentioned in the "integrate" help-page: integrate(dnorm,0,20000) ## fails on many systems. This does not happen for an adaptive Simpson or Lobatto quadrature (cf. Matlab). Even though I am hardly familiar with numerical integration the implementation
2006 Nov 18
1
Why SAM has totally diffent results in R2.1.1 and R2.4.0
Hi,
I am using SAM (from siggenes_1.2.11 package) method to select genes from
a microarray data set. After installing the latest R2.4.0 on my computer, to
my surprise the results are totally different from that calculated using
R2.1.1. Even the example code doesn't work the same way under these two
versions of R. Does anybody know what is going on? Thanks for any
suggestions.
2003 Jul 11
2
using SVD to get an inverse matrix of covariance matrix
Dear R-users,
I have one question about using SVD to get an inverse
matrix of covariance matrix
Sometimes I met many singular values d are close to 0:
look this example
$d
[1] 4.178853e+00 2.722005e+00 2.139863e+00
1.867628e+00 1.588967e+00
[6] 1.401554e+00 1.256964e+00 1.185750e+00
1.060692e+00 9.932592e-01
[11] 9.412768e-01 8.530497e-01 8.211395e-01
8.077817e-01 7.706618e-01
[16]
2011 Sep 04
1
mrtg 2.16.2 ipv6 on centos 6
Hi,
i'm running CentOS 6.0 on my server and installed mrtg from the
rpm-package mrtg-2.16.2 .
I also installed the depending packages perl-IO-Socket-INET6
perl-Socket6 ....
mrtg works fine with IPV4-Addresses. When i specify a Target by
IPV6-Address (or hostname resolving to a V6-address) mrtg fails.
Here i have a small sample-config for V4 which is working:
LogDir: /tmp
ThreshDir: /tmp
2012 Sep 09
8
bsnmpd always died on HDD detach
I am running bsnmpd with basic snmpd.config (only community and location
changed).
When there is a problem with HDD and disk disapeared from ATA channel
(eg.: disc physically removed) the bsnmpd always dumps core:
kernel: pid 1188 (bsnmpd), uid 0: exited on signal 11 (core dumped)
I see this for a long rime on all releases of 7.x and 8.x branches (i386
and amd64). I did not tested 9.x.
Is
2016 Nov 07
21
[Bug 98630] New: Bad color and glitches on PPC64
https://bugs.freedesktop.org/show_bug.cgi?id=98630
Bug ID: 98630
Summary: Bad color and glitches on PPC64
Product: Mesa
Version: 13.0
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/nouveau
Assignee: nouveau at lists.freedesktop.org
2007 Mar 21
2
Gaussian Adaptive Quadrature
Hi all,
Does anybody know any function that performs gaussian adapative quadrature integration of univariate functions?
Thanks in advance,
Regards,
Caio
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2007 Nov 21
3
what is the recommended samba version on solaris?
Guys
I was so frustrated about installing samba with ADS and winbind support
on solaris 8.
After fixing many problems, I am now facing another problem:
I created a directory "test" in the samba share and was editing a file
under the directory "test" and in the meantime the machine was rebooted.
After the machine is started, the
whole directory "test" is gone.
I
2023 Jul 16
1
NUT start service problem
Hello, interesting to hear. What version of NUT, what way of installation
on Windows, what sort of UPS (USB or some other)?
Asking because this info is lacking and currently there are a few variants
to consider:
* an MSI package based on NUT v2.6.5 (last released about 9 years ago as
"2.6.5-6"),
* results of re-integration of that codebase into current NUT master (some
months after
2009 Mar 22
4
7.2-PRERELEASE/sunx2200/bge/msi broken
Hi,
between March 16 and now, bge on a Sun X2200 stopped working,
turning off msi (via hw..pci.enable_msi=0) got it working again.
I tried first replacing bge with an older version but that did not help.
please advice :-)
Danny
2012 Feb 26
1
strucchange breakpoints (Bai and Perron, 1998, 2003)
If I try the breakpoints() function (strucchange package) with a minimum
segment size = the number of regressors, there appears the following error
message:
"minimum segment size must be greater than the number of regressors"
According to the documentation:
"breakpoints implements the algorithm described in Bai & Perron (2003) for
simultaneous estimation of multiple
2011 Apr 16
1
spatstat regression troubles
Hi Everyone,
I am trying to figure out the spatstat package for the first time and am having some trouble. Unfortunately, I can't post my data set but I'll hopefully post enough details for some help.
I want to model the intensity of a spatial point process using 2 covariates from my data. After reading through the documentation, I have successfully created 2 "ppp" objects. The
2009 May 08
1
ADAPTIVE QUADRATURE WEIGHTS AND NODES
Can anyone help me on how to get the nodes and weights of the adaptive quadrature
using R.
Best wishes
Boikanyo.
-----
The University of Glasgow, charity number SC004401
2016 Nov 13
7
[Bug 98712] New: [PPC64] GPU Lock Up when Nouveau 2D acceleration is enabled + X failures
https://bugs.freedesktop.org/show_bug.cgi?id=98712
Bug ID: 98712
Summary: [PPC64] GPU Lock Up when Nouveau 2D acceleration is
enabled + X failures
Product: xorg
Version: 7.7 (2012.06)
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component:
2013 Oct 11
3
Gaussian Quadrature for arbitrary PDF
Hi all,
We know that Hermite polynomial is for
Gaussian, Laguerre polynomial for Exponential
distribution, Legendre polynomial for uniform
distribution, Jacobi polynomial for Beta distribution. Does anyone know
which kind of polynomial deals with the log-normal, Studentæ¯ t, Inverse
gamma and Fisheræ¯ F distribution?
Thank you in advance!
David
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2007 Nov 20
3
winbind caused "ls -l" hang on solaris 8
Hi Guys
I compiled Samba 3.0.26a --with-ads and --with-winbind with krb5-1.6.2
and openldap-2.3.38 using
gcc version 3.4.6 on Solaris 8.
and added winbind in passwd entry in /etc/nsswitch.conf
passwd: files winbind
The problem is the entry "passwd: files winbind" in /etc/nsswitch.conf
caused "ls -l" and Samba hang.
If winbind is removed from nsswitch.conf, "ls
2006 Apr 28
1
gauss.quad.prob
I've written a series of functions that evaluates an integral from -inf to a or b to +inf using equally spaced quadrature points along a normal distribution from -10 to +10 moving in increments of .01. These functions are working and give very good approximations, but I think they are computationally wasteful as I am evaluating the function at *many* points.
Instead, I would prefer to use
2008 Sep 27
3
Double integration - Gauss Quadrature
Hi,
I would like to solve a double integral of the form
\int_0^1 \int_0^1 x*y dx dy
using Gauss Quadrature.
I know that I can use R's integrate function to calculate it:
integrate(function(y) {
sapply(y, function(y) {
integrate(function(x) x*y, 0, 1)$value
})
}, 0, 1)
but I would like to use Gauss Quadrature to do it.
I have written the following code (using R's statmod package)
2010 Jul 19
7
[LLVMdev] MC-JIT
Together with Jan Sjodin (in copy of this email), we begin an
implementation of the JIT with MC. The idea, suggested by Jan, is to
develop a MCJIT in parallel of the current JIT and to keep the two
implementations until (at least) the new MC one is mature enough.
Currently code is kept on gitorious
(http://gitorious.org/llvm-mc-jit/llvm-mc-jit).
Following this, a boolean "bool MCJIT =
2010 Apr 14
2
Gaussian Quadrature Numerical Integration In R
Hi All,
I am trying to use A Gaussian quadrature over the interval (-infty,infty) with weighting function W(x)=exp(-(x-mu)^2/sigma) to estimate an integral.
Is there a way to do it in R? Is there a function already implemented which uses such weighting function.
I have been searching in the statmode package and I found the function "gauss.quad(100, kind="hermite")" which uses