Displaying 20 results from an estimated 1000 matches similar to: "density() with confidence intervals"
2010 Mar 20
3
Is winbindd required for Windows 7 clients
I'm having problems to et windows 7 clients running in my samba 3.4.2 PDC. They always load temporary profiles. WinXP clients are working perfectly. Is winbindd with an LDAP backend required for windows 7 clients? I didn't configure it because it was not necessary for winXP.
regards robert
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2012 Nov 08
2
Comparing nonlinear, non-nested models
Dear R users,
Could somebody please help me to find a way of comparing nonlinear, non-nested
models in R, where the number of parameters is not necessarily different? Here
is a sample (growth rates, y, as a function of internal substrate
concentration, x):
x <- c(0.52, 1.21, 1.45, 1.64, 1.89, 2.14, 2.47, 3.20, 4.47, 5.31, 6.48)
y <- c(0.00, 0.35, 0.41, 0.49, 0.58, 0.61, 0.71, 0.83, 0.98,
2009 Oct 27
1
wilcox.exact() problem
Dear R friends,
here I write again about the wilcox.exact() problem. I want to compare two sets of categorical data, and in one case it says "negative length vectors not allowed", and in the other one I get the error "cannot allocate vector of length ...".
On http://rapidshare.com/files/298621893/wilcox.exact_trouble.Rdata.html you can download the data that cause the
2009 Aug 18
2
(no subject)
Dear all,
I have a problem with the function read.xls from the gdata package, error message see below. Two examples:
First, I try to read my data, which does not work;
Secondly, I tried the example code/data with the Iris data, which worked
Any idea?
Thanks,
Lars
> path<-"I:/subProjects/bh/HPGD/"
>
> setwd(path)
>
> xls <- "Platten_Liste_090421.xls"
2004 Dec 20
2
problems with limma
I try to send this message To Gordon Smyth at smyth at vehi,edu.au but it bounced
back, so here it is to r-help
I am trying to use limma, just downloaded it from CRAN. I use R 2.0.1 on Win XP
see the following:
> library(RODBC)
> chan1 <- odbcConnectExcel("D:/Data/mgc/Chips/Chips4.xls")
> dd <- sqlFetch(chan1,"Raw") # all data 12000
> #
> nzw <-
2009 Jul 28
2
A hiccup when using anova on gam() fits.
I stumbled across a mild glitch when trying to compare the
result of gam() fitting with the result of lm() fitting.
The following code demonstrates the problem:
library(gam)
x <- rep(1:10,10)
set.seed(42)
y <- rnorm(100)
fit1 <- lm(y~x)
fit2 <- gam(y~lo(x))
fit3 <- lm(y~factor(x))
print(anova(fit1,fit2)) # No worries.
print(anova(fit1,fit3)) # Likewise.
print(anova(fit2,fit3)) #
2011 Sep 12
1
coxreg vs coxph: time-dependent treatment
Dear List,
After including cluster() option the coxreg (from eha package)
produces results slightly different than that of coxph (from survival)
in the following time-dependent treatment effect calculation (example
is used just to make the point). Will appreciate any explaination /
comment.
cheers,
Ehsan
############################
require(survival)
require(eha)
data(heart)
# create weights
2008 Jan 05
1
Likelihood ratio test for proportional odds logistic regression
Hi,
I want to do a global likelihood ratio test for the proportional odds
logistic regression model and am unsure how to go about it. I am using
the polr() function in library(MASS).
1. Is the p-value from the likelihood ratio test obtained by
anova(fit1,fit2), where fit1 is the polr model with only the intercept
and fit2 is the full polr model (refer to example below)? So in the
case of the
2008 Apr 17
1
survreg() with frailty
Dear R-users,
I have noticed small discrepencies in the reported estimate of the
variance of the frailty by the print method for survreg() and the
'theta' component included in the object fit:
# Examples in R-2.6.2 for Windows
library(survival) # version 2.34-1 (2008-03-31)
# discrepancy
fit1 <- survreg(Surv(time, status) ~ rx + frailty(litter), rats)
fit1
fit1$history[[1]]$theta
2009 Apr 24
2
prediction intervals (alpha and beta) for model average estimates from binomial glm and model.avg (library=dRedging)
Hi all,
I was wondering if there is a function out there, or someone has written code for making confidence intervals around model averaged predictions (y~á+âx). The model average estimates are from the dRedging library?
It seems a common thing but I can't seem to find one via the search engines
Examples of the models are:
fit1 <- glm(y~ dbh, family = binomial, data = data)
fit2 <-
2018 Jan 17
1
Assessing calibration of Cox model with time-dependent coefficients
I am trying to find methods for testing and visualizing calibration to Cox
models with time-depended coefficients. I have read this nice article
<http://journals.sagepub.com/doi/10.1177/0962280213497434>. In this paper,
we can fit three models:
fit0 <- coxph(Surv(futime, status) ~ x1 + x2 + x3, data = data0) p <-
log(predict(fit0, newdata = data1, type = "expected")) lp
2005 Jun 15
1
anova.lme error
Hi,
I am working with R version 2.1.0, and I seem to have run into what looks
like a bug. I get the same error message when I run R on Windows as well as
when I run it on Linux.
When I call anova to do a LR test from inside a function, I get an error.
The same call works outside of a function. It appears to not find the right
environment when called from inside a function. I have provided
2011 Jan 05
1
Comparing fitting models
Dear all,
I have 3 models (from simple to complex) and I want to compare them in order to
see if they fit equally well or not.
From the R prompt I am not able to see where I can get this information.
Let´s do an example:
fit1<- lm(response ~ stimulus + condition + stimulus:condition, data=scrd)
#EQUIVALE A lm(response ~ stimulus*condition, data=scrd)
fit2<- lm(response ~ stimulus +
2010 Apr 03
4
question difference of roaming profile between WinXP and Win7
Hello
I want to add Win7 machine to my Samba PDC with WinXP clients. Google tells me I have to add a .V2 to my profiles. The samba log ask about a .v2 share.
Can someone explain me the difference of the v2 extension at the profile names and the roaming profile share?
Following my settings:
smb.conf:
[global]
logon path = \\%L\nt-profile
logon home = \\%L\nt-profile
[nt-profile]
2011 Jan 21
2
Looping with incremented object name and increment function
Folks,
I am trying to get a loop to run which increments the object name as part of
the loop. Here "fit1" "fit2" "fit3" and "fit4" are linear regression models
that I have created.
> for (ii in c(1:4)){
+ SSE[ii]=rbind(anova(fit[ii])$"Sum Sq")
+ dfe[ii]=rbind(summary(fit[ii])$df)
+ }
Error in anova(fit[ii]) : object 'fit' not found
2010 Jan 11
1
K-means recluster data with given cluster centers
K-means recluster data with given cluster centers
Dear R user,
I have several large data sets. Over time additional new data sets will be created.
I want to cluster all the data in a similar/ identical way with the k-means algorithm.
With the first data set I will find my cluster centers and save the cluster centers to a file [1].
This first data set is huge, it is guarantied that cluster
2018 Jan 18
1
Time-dependent coefficients in a Cox model with categorical variants
First, as others have said please obey the mailing list rules and turn of
First, as others have said please obey the mailing list rules and turn off html, not everyone uses an html email client.
Here is your code, formatted and with line numbers added. I also fixed one error: "y" should be "status".
1. fit0 <- coxph(Surv(futime, status) ~ x1 + x2 + x3, data = data0)
2. p
2009 Sep 25
6
update of openssh-server i386 4.3p2-36.el5, dependencies
Any ideas why there is such a dependency hell?
It's a server host, I don't need any GTK stuff etc.
> yum install openssh-*
output:
---------
Dependencies Resolved
=============================================================================
Package Arch Version Repository Size
2009 Apr 28
1
How to read the summary
How can I from the summary function, decide which glm (fit1, fit2 or fit3)
fits to data best? I don't know what to look after, so I would please
explain the important output.
> fit1 <- glm(Y~X, family=gaussian(link="identity"))
> fit2 <- glm(Y~X, family=gaussian(link="log"))
> fit3 <- glm(Y~X, family=Gamma(link="log"))
> summary(fit1)
Call:
2010 Jun 07
1
fit data with y = x^-1
Dear list,
I am getting weired with fitting data with a 1/x-polynomial. Suggest I have
the following data:
x <- c(1,2,3,4,5,6,7)
y <- c(100,20,4,2,1,.3,.1)
I may fit this with a linear model
fit1 = lm(y ~ I(x))
Getting plot out of this model I applied
library(polynom)
pol1 = polynomial(fit1$coefficients)
f1 = as.function(pol1)
plot(x,y)
lines(x, f1(x), col = 2)
Clearly, this model