Displaying 20 results from an estimated 2000 matches similar to: "How to specify Variance Covariance matrix of residuals?"
2017 Aug 17
0
nlme package, fixing variance.covariance matrix of residuals
Dear R team,
I would like to do a multivariate meta-analysis in R using the nlme package. In meta-analysis I fix the residuals to known sampling errors. As I do a multivariate analysis, I have a variance-covariance matrix of sampling errors. Unfortunately, via varFixed I can only fix a vector of sampling errors and no matrix.
In the R package metafor using the rma.mv function I can insert the
2006 Feb 22
1
var-covar matrices comparison
> Date: Mon, 20 Feb 2006 16:43:55 -0600
> From: Aldi Kraja <aldi at wustl.edu>
>
> Hi,
> Using package gclus in R, I have created some graphs that show the
> trends within subgroups of data and correlations among 9 variables (v1-v9).
> Being interested for more details on these data I have produced also the
> var-covar matrices.
> Question: From a pair of two
2006 Oct 24
1
Variance Component/ICC Confidence Intervals via Bootstrap or Jackknife
I'm using the lme function in nmle to estimate the variance components
of a fully nested two-level model:
Y_ijk = mu + a_i + b_j(i) + e_k(j(i))
lme computes estimates of the variances for a, b, and e, call them v_a,
v_b, and v_e, and I can use the intervals function to get confidence
intervals. My understanding is that these intervals are probably not
that robust plus I need intervals on the
2008 Oct 18
0
extracting residual variance from glmmPQL
Dear all,
I am trying to simulate data sets from a model fitted with glmmPQL, in
order to compute the distribution of a summary statistics. My data are
binomial and I have a correlation term in my model. My model is
structured in the following way
m <- glmmPQL( fixed = cbind(sucess,failure) ~ x1 + x2 + ... ,
random = ~ 1 | bidon,
correlation = corGaus(form=~
2012 Sep 18
2
extracting column and regular interval in R
Dear R users,
i have a matrix with 31 rows and 444 columns and i want to extract every 37th column of that matrix starting from 1. more precisely i want to select columns 1, 38,75, 112 and so on. then doing the same by starting from column number 2(2,39,76,113.......).
i know that there is a manual way of doing it but i wanted to make it more quickly as i have fairly large data to dealth with.
2016 Jul 19
0
Announcing release of Maven 3.3 on CentOS Linux 7 x86_64 SCL
I am pleased to announce the immediate availability of Maven in version
3.3 on CentOS Linux 7 x86_64, delivered via a Software Collection (SCL)
built by the SCLo Special Interest Group
(https://wiki.centos.org/SpecialInterestGroup/SCLo).
QuickStart
----------
You can get started in three easy steps:
$ sudo yum install centos-release-scl
$ sudo yum install rh-maven33
$ scl
2016 Jul 19
0
Announcing release of Maven 3.3 on CentOS Linux 7 x86_64 SCL
I am pleased to announce the immediate availability of Maven in version
3.3 on CentOS Linux 7 x86_64, delivered via a Software Collection (SCL)
built by the SCLo Special Interest Group
(https://wiki.centos.org/SpecialInterestGroup/SCLo).
QuickStart
----------
You can get started in three easy steps:
$ sudo yum install centos-release-scl
$ sudo yum install rh-maven33
$ scl
2017 Nov 28
0
Announcing release of Maven 3.5 on CentOS Linux 7 x86_64
I am pleased to announce the immediate availability of Maven
in version 3.5 on CentOS Linux 7 x86_64, delivered via a Software
Collection (SCL) built by the SCLo Special Interest Group
(https://wiki.centos.org/SpecialInterestGroup/SCLo).
QuickStart
----------
You can get started in three easy steps:
$ sudo yum install centos-release-scl
$ sudo yum install rh-maven35
$ scl enable
2014 Nov 25
0
Dealing with an unreliable remote
On 25.11.2014 15:02, net.rsync at io7m.com wrote:
> 'Lo.
>
> I've run into a frustrating issue when trying to synchronize a
> directory hierarchy over a reliable (but slow) connection to an
> unreliable remote. Basically, I have the following:
>
> http://mvn-repository.io7m.com/com/io7m/
>
> This is a set of nested directories containing binaries and
2014 Nov 25
0
Dealing with an unreliable remote
(until a better answer comes along)
The killed rsync process should leave a temporary file .<file-name>.<random>
If you rename the temporary to the real file name, rsync should continue
from about where it left off.
-----Original Message-----
From: rsync-bounces at lists.samba.org [mailto:rsync-bounces at lists.samba.org]
On Behalf Of net.rsync at io7m.com
Sent: Tuesday, November 25,
2007 Oct 11
2
test for whether dataset comes from a known MVN
Dear all,
I have a multivariate dataset containing 100,000 or more points.
I want find the p-value for the dataset of points coming from a
particular multivariate normal distribution
With
mean vector u
Covariance matrix s2
So
H0: points ~ MVN( u, s2)
H1: points not ~ MVN( u, s2)
How do I find the p-value in R?
To me this is a likelihood ratio test problem.
In H0 the parameters are
2003 Jul 06
1
Conditional Distribution of MVN variates
Hi Folks,
Given k RVs with MVN distribution N(mu,S) (S a kxk covariance matrix),
let (w.l.o.g.) X1 denote the first r of them, and X2 the last (k-r).
Likewise, let mu1 and mu2 denote their respective expectations.
Then, of course, the expectation of X2 given X1=x1 is
mu2 + S21*inv(S22)*(x1 - mu1)
and the covariance matrix of X2 given X1=x2 is
S22 - S21*inv(X11)*S12
where Sij is the
2011 Dec 09
2
Error using function MVN in package MCLUST: Fortran symbol name not in DLL for package
Hi All,
I need to fit a mutlivariate normal model to a dataset in order to obtain the mean and covariance parameters. I see that the MVN function in the MCLUST package can do this, however when I try to run even the simplest example provided in the documentation, as below, I get the following error:
n <- 1000
set.seed(0)
x <- rnorm(n, mean = -1, sd = 2)
mvn(modelName = "X", x)
2014 Nov 25
5
Dealing with an unreliable remote
'Lo.
I've run into a frustrating issue when trying to synchronize a
directory hierarchy over a reliable (but slow) connection to an
unreliable remote. Basically, I have the following:
http://mvn-repository.io7m.com/com/io7m/
This is a set of nested directories containing binaries and sources for
projects I develop/maintain. Every time a new release is made, I deploy
the binaries and
2007 Feb 22
1
GotoIf DURATION
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=UTF-8" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
<font face="Helvetica, Arial, sans-serif">Hi,<br>
<br>
I am
2009 Jun 29
1
[LLVMdev] difficulting matching i64 subtract immediate due to isel normalization of sub -> add
Hi,
For some 64-bit immediates, ARM can generate a two instruction
sequence. For example, for the following code:
; 734439407618 = 0x000000ab00000002
define i64 @f1(i64 %a) {
%tmp = sub i64 %a, 734439407618
ret i64 %tmp
}
We should be able to generate:
subs r0, r0, #1
sbc r1, r1, #171 @ 0xab
But instead we get:
$ llvm-as < %s | llc -march=thumb -mattr=+thumb2
mvn r2, #1
2012 Apr 18
1
Add covariate in nlme?
Hi R-experts,
I have a problem using nlme. I use the following code to group my data:
Parameterg <- groupedData( result ~ time | Batch,
data = Batchdata,
labels = list( x = "Time", y = "analysis")
)
and then uses the nlme function to fit a nonlinear mixed model that includes
Process as a fixed covariate:
nlme.model001epr <- nlme(result ~ A0 * exp(- ( exp(A1)
2012 Jun 12
0
Specifying spatial correlation Form in nmle
Dear R users,
I'm applying a correlation structure in a mixed model (nmle function) to
control for spatial correlation between land parcels that are adjacent to
each other. I generated X,Y coordinates in ArcGIS for each land parcel and
used them in the correlation form like this:
test.exp<-corExp(1, form = ~ X + Y)
test.exp<- Initialize(test.exp,dataset)
However, the correlation
2013 Jun 24
0
Running MCMC using R2WinBUGS
Hi All:
Not sure why my previous question never got posted. Here I am seeking some
help on my code. I am using the following code to run MCMC simulation on
the following data using the model below:
# Data
matrix<-NULL
> csvs<-paste("MVN", 1:2,".csv",sep="")
> for (i in 1:length(csvs)){
+ matrix[[i]]<- read.csv(file=csvs[i],header=TRUE)
+
2006 Jan 18
2
Windows package upates
Dear list
Having just started to use the Windows version, I am very impressed with
it's package handling as well as the gui.
So I tried to see what was due for update and packages such as Hmisc,
Matrix and others came up.
But when I had updated them - which took a few goes as something hung
between here and Bristol - I noticed that the default packages such as
nmle, MASS had disappeared. I