Displaying 20 results from an estimated 3000 matches similar to: "Random Effects for One-Way Anova"
2005 Jun 09
1
Prediction in Cox Proportional-Hazard Regression
He,
I used the "coxph" function, with four covariates.
Let's say something like that
> model.1 <- coxph(Surv(Time,Event)~X1+X2+X3+X4,data=DATA)
So I obtain the 4 coefficients B1,B2,B3,B4 such that
h(t) = h0(t) exp(B1*X1+ B2*X2 + B3*X3 + B4*X4).
When I use the function on the same data
> predict.coxph(model.1,type="lp")
how it works in making the prediction?
2009 Mar 21
1
oggetto gstat
Ciao a tutti ho appena iniziato ad utilizzare R per ora per attuare un'analisi
geostatistica di dati. Volevo sapere come poter creare un oggetto gstat
partendo da un file testo(che ho gia importato con read.table)e che contiene 3
colonne: x,y,value. Mi servirebbe far questo per costruire un variogramma. So
che la domanda molto probabilmente per voi sara' banale....vi ringrazio
2006 Jun 16
3
Aiuto
Salve a tutti;
Sono un neofita di Ruby, sinceramente Rails ancora non lo ho utilizzato.
Sono uno studente universitario, ora sto preparando una tesina su un
framework per sviluppare applicazioni web non so se lo conoscete e lo
Spring webflow.
nella tesina ho cercato di convincere il prof sul fatto che Rails ?
migliore.
Solo che lui mi ha fatto una domanda che mi ha spiazzato alla quale al
2012 Dec 02
1
Repeated-measures anova with a within-subject covariate (or varying slopes random-effects?)
Dear all,
I am having quite a hard time in trying to figure out how to correctly
spell out a model in R (a repeated-measures anova with a
within-subject covariate, I guess). Even though I have read in the
posting guide that statistical advice may or may not get an answer on
this list, I decided to try it anyway, hoping not to incur in
somebody's ire for misusing the tool.
For the sake of
2004 Aug 08
1
(REPOST) Simple main effects in 2-way repeated measure ANOVA
Hi all
I am running a 2-way repeated measure anova with 1 between-subjects
factor (Group=treatment, control), and 1 within-subject factor (Time of
measurement: time1, time2). I extract the results of the anova with:
summary(aov(effect ~ Group*Time + Error=Subj/Time, data=mydata))
Now, this must be clearly a dumb question, but how can I quickly
extract in R all the post-hoc t-tests for the
2007 Jun 08
6
"R is not a validated software package.."
Dear All,
discussing with a statistician of a pharmaceutical company I received
this answer about the statistical package that I have planned to use:
As R is not a validated software package, we would like to ask if it
would rather be possible for you to use SAS, SPSS or another approved
statistical software system.
Could someone suggest me a 'polite' answer?
TIA
Giovanni
--
dr.
2008 Feb 07
1
Appell Hypergeometric function
Dear All,
I am looking for an implementation in R of the Appell Hypergeometric
function.
Any suggestions will be more than appreciated!
GP
--
dr. Giovanni Parrinello
External Lecturer
Medical Statistics Unit
Department of Biomedical Sciences
Viale Europa, 11 - 25123 Brescia Italy
Tel: +390303717528
Fax: +390303717488
email: parrinel at med.unibs.it
2004 Feb 05
2
Incomplete Factorial design
Hello,
I am planning a study with the main point to evaluate the interaction of two treatments,
but for ethical reasons one cell is empty, that with patients receaving no treatment at all
Treatment B
2004 Aug 05
1
Post-hoc t-tests in 2-way repeated measure ANOVA
Hi all
I am running a 2-way repeated measure anova with 1 between-subjects
factor (Group=treatment, control), and 1 within-subject factor (Time of
measurement: time1, time2). I extract the results of the anova with:
summary(aov(effect ~ Group*Time + Error=Subj/Time, data=mydata))
Now, this must be clearly a dumb question, but how can I quickly extract
in R all the post-hoc t-tests for the
2004 Nov 09
3
Strange results for Beta Distribution
Dear All,
I got these results from the example in the function "dbeta":
>x <- seq(0, 1, length=21)
> dbeta(x, 1, 1)
[1] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Any Idea?
TIA
Giovanni
dr. Giovanni Parrinello
Section of Medical Statistics
Department of Biosciences
University of Brescia
25127 Viale Europa, 11
Brescia Italy
Tel: +390303717528
Fax: +390303701157
2006 Jan 18
2
Loading of namespace on load of .Rdata (was strange behaviour of load)
Last week Giovanni Parrinello posted a message asking why various packages were loaded when he loaded an .Rdata file. Brian Ripley replied saying he thought it was because the saved workspace contained a reference to the namespace of ipred. (Correspondence copied below).
This begs the question: how did the reference to the namespace of ipred come to be in the .Rdata file? Brian did say it is
2006 May 11
3
(no subject)
Good morning,
i'm drawing a barplot (data are stored in a matrix,nrow=3,ncol=10). So i
get 10 groups each containing 3 sub-bars. I need to change the range of
the y-axis when i plot respectively the first and the other two sub-bars
in each group. I can't manage. Could you help me?
Thank you.
Angela
2005 Nov 22
2
residuals.coxph
Dear All,
I am trying to apply the function 'cox.zph' of the library survival, but I receive this error message:
not found the object 'residuals.coxph'.
I have re-installed the library 'survival' without any change and also a search with RSiteSearch was unsuccessful..
Any suggestion?
TIA
Giovanni
PS:
R 2.2.0
Windows XP HE
dr. Giovanni Parrinello
Section of Medical
2008 May 12
4
Left censored responses in mixed effects models
Dear R Fellow-Travellers:
What is your recommended way of dealing with a left-censored response
(non-detects) in (linear Gaussian) mixed effects models?
Specifics: Response is a numeric positive measurement (of volume, actually);
but when it falls below some unknown and slightly random value (depending on
how the sample is prepared and measured), it cannot be measured and is
recorded as 0.
2006 Jul 20
2
(robust) mixed-effects model with covariate
Dear all,
I am unsure about how to specify a model in R and I thought of asking
some advice to the list. I have two groups ("Group"= A, B) of
subjects, with each subject undertaking a test before and after a
certain treatment ("Time"= pre, post). Additionally, I want to enter
the age of the subject as a covariate (the performance on the test is
affected by age),
2018 Jan 19
4
Internal DNS logging
Thanks Denis,
I was looking for the option 'dns:x' in the wiki but I didn't find it.
Now it works.
I used
log level = 3 auth:3 dns:0
auth_audit:3 gives me unknown class message
But where I can find a complete list of classes for log level?
I'll also give a try on the last version of samba with json.
Thanks again
Giuseppe
On 1/18/2018 4:52 PM, Denis Cardon wrote:
2008 Jul 02
14
is it possible to add a mirror device later?
Ciao,
the rot filesystem of my thumper is a ZFS with a single disk:
bash-3.2# zpool status rpool
pool: rpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
c5t0d0s0 ONLINE 0 0 0
spares
c0t7d0 AVAIL
c1t6d0 AVAIL
c1t7d0
2009 Nov 02
3
partial matching with grep()
dear all,
This is a probably a silly question.
If I type
> grep("x",c("a.x" ,"b.x","a.xx"),value=TRUE)
[1] "a.x" "b.x" "a.xx"
Instead, I would like to obtain only
"a.x" "b.x"
How is it possible to get this result with grep()?
many thanks for your attention,
best,
vito
--
2014 Jun 23
4
[PATCH] Support for ASEM UPS on Linux/i2c
On 18/06/2014 04:17, Charles Lepple wrote:
> On Jun 13, 2014, at 2:53 AM, Giuseppe Corbelli <giuseppe.corbelli at copanitalia.com> wrote:
>
>> As said in previous mail, I just finished a first working version of a driver for the UPS found on ASEM PB1300 device
>> (http://www.asem.it/prodotti/industrial-automation/box-pcs/performance/pb1300/)
>> Linux only, accessed
2008 Jun 30
2
difference between MASS::polr() and Design::lrm()
Dear all,
It appears that MASS::polr() and Design::lrm() return the same point
estimates but different st.errs when fitting proportional odds models,
grade<-c(4,4,2,4,3,2,3,1,3,3,2,2,3,3,2,4,2,4,5,2,1,4,1,2,5,3,4,2,2,1)
score<-c(525,533,545,582,581,576,572,609,559,543,576,525,574,582,574,471,595,
557,557,584,599,517,649,584,463,591,488,563,553,549)
library(MASS)
library(Design)