Displaying 20 results from an estimated 400 matches similar to: "Problem in a programming"
2011 Mar 10
0
OptFederov and Dopt.design
Dear R users,
I have used the AlgDesign package to construct a D-optimal exp. design from
a file containing a set of allowed runs. The code for the optFederov call is
below:
#Using optFederov ------------------------------
library(AlgDesign)
options(contrasts=c("contr.sum","contr.poly"))
file<- read.table("C:/Upstream/Designs/Vodacom Tanzania phase1
2007 Aug 30
0
bug in DEoptim package
(the same mail was sent to the author)
When I called the function DEoptim with control=list(strategy=1) or
control=list(strategy=2)
I got the error:
Error in mui[rtd + 1, i] : incorrect number of dimensions
Analysis of the source code of the DEoptim reveals the following fragment
if (con$strategy > 5)
st <- con$strategy - 5 ## binomial crossover
else {
st <-
2004 Mar 28
2
Dopt program!
Hi all,
Does anybody have a workable dopt program in R to generate D-optimal designs. I downloaded dopt.zip from stat homepage of the university of oxford, whenever I load it into R and try to run, the following error comes: Error: couldn't find function "Dopt".
Any information will be highly appreciated!
Thank you!
Harvey.
---------------------------------
[[alternative HTML
2003 May 13
1
Dopt for Windows
Hi,
I would like to have some advise about how to install Dopt on R for Windows.
I can not manage to properly compile Dopt.f anf to get a suitable dll for R.
Can someone explain me step by step what should I do ?
Thanks in advance
Isabelle Zabalza-Mezghani
2008 Dec 28
1
Random coefficients model with a covariate: coxme function
Dear R users:
I'm new to R and am trying to fit a mixed model
Cox regression model with coxme function.
I have one two-level factor (treat) and one
covariate (covar) and 32 different groups
(centers). I'd like to fit a random coefficients model, with treat and covar
as fixed factors and a random intercept, random
treat effect and random covar slope per center.
I haver a couple of
2008 Feb 20
3
reshaping data frame
Dear all,
I'm having a few problems trying to reshape a data frame. I tried with
reshape{stats} and melt{reshape} but I was missing something. Any help is
very welcome. Please find details below:
#################################
# data in its original shape:
indiv <- rep(c("A","B"),c(10,10))
level.1 <- rpois(20, lambda=3)
covar.1 <- rlnorm(20, 3, 1)
level.2
2006 Feb 20
1
var-covar matrices comparison:
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 subsets of data (with 9 variables each, I
have two var-covar matrices for each subgroup, that differ for a
treatment on one
2012 Mar 23
0
loops
Hi
I'm running QDA on some data and calculating the discriminant function.
qda.res <- qda(type ~ npreg + glu + bp + skin + bmi + ped + age)
ind_yes <- c(1:N)[type == "Yes"]
> ind_no <- c(1:N)[type == "No"]
> cov_yes <- cov(table[ind_yes, 1:7] )
> cov_no <- cov(table[ind_no, 1:7] )
> covar<-list(cov_no, cov_yes)
qdf<- function(x,
2008 Mar 04
3
VMWare error: Use of uninitialized value in string eq
Hi all
I hope anyone can help me with this. I'm trying to get vmware to play
along nicely on CentOS 5.1 x64, but I get errors when I try and start a
vmx image, or list them. This the the error:
[root at backup vmware-mui-distrib]# vmware-cmd -l
Use of uninitialized value in string eq at
/usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/VMware/VmPerl.pm
line 114.
2010 May 24
2
Table to matrix
Dear R users,
I am trying to make this (3 by 10) matrix A
--A----------------------------------------------------
0 0 0 0 1 0 0 0 0 0
0 0 0 0 0 1 0 0 0 0
0 0.5 0.5 0 0 0 0 0 0 0
-------------------------------------------------------
from "mass.func"
--mass.func-------------------------------------------
> mass.func
$`00`
prop
5
1
$`10`
2002 Jun 19
1
best selection of covariates (for each individual)
Dear All,
This is not strictly R related (though I would implement the solution in R;
besides, being this list so helpful for these kinds of stats questions...).
I got a "strange" request from a colleage. He has a bunch (approx. 25000)
subjects that belong to one of 12 possible classes. In addition, there are 8
covariates (factors) that can take as values either "absence"
2010 Aug 11
4
Arbitrary number of covariates in a formula
Hello!
I have something like this:
test1 <- data.frame(intx=c(4,3,1,1,2,2,3),
status=c(1,1,1,0,1,1,0),
x1=c(0,2,1,1,1,0,0),
x2=c(1,1,0,0,2,2,0),
sex=c(0,0,0,0,1,1,1))
and I can easily fit a cox model:
library(survival)
coxph(Surv(intx,status) ~ x1 + x2 + strata(sex),test1)
However, I want to
2007 Apr 11
1
creating a path diagram in sem
Hello,
I finally run my measurement model in sem - successfully. Now, I am trying to print out the path diagram that is based on the results - but for some reason it's not working. Below is my script - but the problem is probably in my very last line:
# ANALYSIS OF ANXIETY, DEPRESSION, AND FEAR - LISREL P.31
library(sem)
# Creating the ANXIETY, DEPRESSION, AND FEAR intercorrelation matrix
2002 Dec 18
1
Windows binary of Dopt library
Dear R-helpers,
Would anybody have a compiled binary version (for Windows) of the Dopt
library that is in the development site?.
best regards,
IOsu
--------------------------------------------------------------
Jes?s Mar?a Fr?as Celayeta
Dublin Institute of Technology
School of Food Sci. and Env. Health.
Cathal Bruha St., Dublin 1. Ireland
Phone: +353 1 4024459 Fax: +353 1 4024495
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
2018 Feb 09
0
Covariates in fuzzy RDD with rddtools
Hello!
I am having trouble including covariates in a fuzzy RDD model in R with rddtools. I run the following commands:
library(rddtools)
data.complete2 <- as.data.frame(cbind(GDPpc.rel, GR.rate, fitval.firstStage)) colnames(data.complete2) <- c("GDPpc.rel", "GR.rate", "FitTreat")
data.RDD<-rdd_data(x=data.complete2$GDPpc.rel,
2012 Jul 26
2
coxph weirdness
Hi all,
I cant' wrap my head around an error from the coxph function (package
survival). Here's an example:
library(survival)
n = 100;
set.seed(1);
time = rexp(n);
event = sample(c(0,1), n, replace = TRUE)
covar = data.frame(z = rnorm(n));
model = coxph(Surv(time, event)~ . , data = covar)
R gives the following error:
> model = coxph(Surv(time, event)~ . , data = covar)
Error in
2012 Oct 04
1
geoRglm with factor variable as covariable
Dear R users.
I'm trying to fit a generalised linear spatial mode using the geoRglm
package. To do so, I'm preparing my data (geodata) as follow:
geoData9093 = as.geodata(data9093, coords.col= 17:18, data.col=15,*
covar.col=16*)
where covar.col is a factor variable (years in this case 90-91-92-93)).
Then I run the model as follow:
/
model.5 = list(cov.pars=c(1,1),
2013 Mar 11
2
How to 'extend' a data.frame based on given variable combinations ?
Dear expeRts,
I have a data.frame with certain covariate combinations ('group' and 'year')
and corresponding values:
set.seed(1)
x <- data.frame(group = c(rep("A", 4), rep("B", 3)),
year = c(2001, 2003, 2004, 2005,
2003, 2004, 2005),
value = rexp(7))
My goal is essentially to
2007 Apr 09
3
sem vs. LISREL: sem fails
I am new to R.
I just tried to recreate in R (using sem package and the identical input data) a solution for a simple measurment model I have found before in LISREL. LISREL had no problems and converged in just 3 iterations.
In sem, I got no solution, just the warning message:
"Could not compute QR decomposition of Hessian.
Optimization probably did not converge.
in: sem.default(ram =