Displaying 20 results from an estimated 1000 matches similar to: "about the cox result"
2011 Jul 26
3
a question about glht function
Hi all:
There's a question about glht function.
My data:data_ori,which inclue CD4, GROUP,time.
f_GROUP<-factor(data_ori$GROUP)
f_GROUP is a factor of 3 levels(0,1,2,3)
result <- lme(sqrt(CD4) ~ f_GROUP*time ,random = ~time|ID,data=data_ori)
glht(result, linfct = mcp(f_GROUP="Tukey") )
Error in `[.data.frame`(mf, nhypo[checknm]) : undefined columns selected
I can't
2010 Feb 17
2
extract the data that match
Hi r-users,
I would like to extract the data that match. Attached is my data:
I'm interested in matchind the value in column 'intg' with value in column 'rand_no'
> cbind(z=z,intg=dd,rand_no = rr)
z intg rand_no
[1,] 0.00 0.000 0.001
[2,] 0.01 0.000 0.002
[3,] 0.02 0.000 0.002
[4,] 0.03 0.000 0.003
[5,] 0.04 0.000 0.003
[6,]
2011 Dec 13
8
How to compute 95%CI for OR from logistic regression?
Hi all:
My data has 3 variables:
age(3levels : <30y=1 30-50y=2, >50y=3)
gender(Male=0, Female=1)
CD4 cell count(raw lab measurement)
y(1:death 0:alive)
I perform logistic regression to find out the factors that influence y.
result<-glm(y ~ factor(age) + factor(gender) + CD4,family = binomial)
>From the result,I can get OR(Odds Ratio) of gender via exp(Estimate of Female,
2011 Feb 08
3
intervals {nlme} lower CI greater than upper CI !!!????
Hi folks...
check this out..
> GLU<-lme(gluc~rt*cd4+sex+age+rf+nadir+pharmac+factor(hcv)+factor(hbs)+
+ haartd+hivdur+factor(arv),
+ random= ~rt|id, na.action=na.omit)
> intervals(GLU)$fixed
lower est. upper
(Intercept) 67.3467070345 7.362307e+01 7.989944e+01
rt *0.0148050160* 6.249304e-02 1.101811e-01
cd4
2006 Jul 06
2
KPSS test
Hi,
Am I interpreting the results properly? Are my conclusions correct?
> KPSS.test(df)
---- ----
KPSS test
---- ----
Null hypotheses: Level stationarity and stationarity around a linear trend.
Alternative hypothesis: Unit root.
----
Statistic for the null hypothesis of
level stationarity: 1.089
Critical values:
0.10 0.05 0.025 0.01
0.347 0.463
2011 Jun 28
1
About the covariant
Hi all,I have some questions about the covariants of regression.
My target: To explore the trend of CD4 level through a period of time.
Response variable: CD4 count
Explanatory variable:time
Also, the demology information is available,such as gender,occupation,income
level...
Q1,Are these variables of demology information called covariant?
Q2,How can I correct the impact of
2006 Jul 06
1
Access values in kpssstat-class
Hi,
How can I access the Values stored in kpssstat-class given by KPSS.test function and store it in a variable.
For example:
>x <- rnorm(1000)
>test <- KPSS.test(ts(x))
>test
---- ----
KPSS test
---- ----
Null hypotheses: Level stationarity and stationarity around a linear trend.
Alternative hypothesis: Unit root.
----
Statistic for the null
2002 Sep 09
1
Plots by subject
Hello! I need some help with creating plots for each study subject. I have
tried the 'for' command as described in 'An Introduction to R', but I wasn't
successful.
Here's what I want to do:
-Create and save the following overlayed scatterplots for each subject (1 to
n).
-The data frame is in the form of one line per visit per subject (so more than
one line per
2011 Feb 06
1
random interaction effect in lmer
Hi dears while modeling an interaction random effect in lmer i receive the
instantaneous error message
> ldlM4<-lmer(ldl~rt*cd4+age+rf+pharmac+factor(hcv)+
+ hivdur+(rt:cd4|id),na.action=na.omit,REML=F)
*Warning message:
In mer_finalize(ans) : false convergence (8)
*
I think the matter lies in syntax, 'cause i sistematically receive the same
message even when changing response...
PS:
2011 Jul 25
1
lme convergence error
Hello, I am working from a linux 64 machine on a server with R-2.12 (I can't
update to 2.13). I am iterating through many linear mixed models for
longitudinal data and I occasionally receive the following convergence
error:
> BI.lme <- lme(cd4 ~ time + genBI + genBI:time + C1 + C2 + C11 + C12,
random =~ 1 + time | IID, data = d)
Error in lme.formula(cd4 ~ time + genBI + genBI:time +
2009 Apr 16
1
How can I catch errors thrown from c via the Rcpp error() function?
Hi
I am using the flowClust package from BioConductor, which is largely
implemented in c. For some of my data, the package occasionally (and
quite stochastically) encounters a particular condition which halts its
operation. At this point, it calls the error() function defined by Rcpp,
and halts.
What I would like to be able to do is to catch the error thrown, and
retry the operation a few
2005 Feb 05
1
Addons
Hi All,
A newbie question :-( How do I go about installing the add-ons found in CD4?
Many thanks,
Joao
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2011 Jul 18
1
question about linear mixed model
Hi all:
I have a question about linear mixed model.
my linear mixed model with randomized slope and intercept with interaction
of time and group(g1,g2,g3):
model<- glmmPQL(log10(CD4) ~ time + factor(group)+ time:factor(group),
random = ~time|id)
What I get is only the main and interaction of time and group.My question
is:
1. How can I get the g1,g2,g3's slope respectively?In other
2012 May 22
2
yum problem with glibc
Is anyone getting a yum update problem with glibc and glibc-common?
I'm getting the error message
-------------------------------
Error: Protected multilib versions: glibc-2.12-1.47.el6_2.12.x86_64 !=
glibc-2.12-1.47.el6_2.9.i686
** Found 3 pre-existing rpmdb problem(s), 'yum check' output follows:
bash-4.1.2-9.el6_2.x86_64 is a duplicate with bash-4.1.2-8.el6.centos.x86_64
2010 Jun 26
1
predict newdata question
Hi:
I am using a subset of the below dataset to predict PRED_SUIT for
the whole dataset but I am having trouble with 'newdata'. The model
was created with 153 records and want to predict for 208 records.
wolf2 <- structure(list(gridcell = c(367L, 444L, 533L, 587L, 598L, 609L,
620L, 629L, 641L, 651L, 662L, 674L, 684L, 695L, 738L, 748L, 804L,
805L, 872L, 919L, 929L, 938L, 950L, 958L,
2010 Dec 21
2
please Help me on a repeated measures anova
I currently work on a draft of an aquatic bioassessment. The conditions
tested are the following: ER river water T dechlorinated water control 0.5 +
0.5mg / L of malate T + 1 dechlorinated water control + 1g / L of malate T
ED dechlorinated water control SED + ER + river water sediment SED ED +
sediment + water dechlorinated. It is the result of AChE in muscle (fillet
of fish). The production of
2011 Mar 22
1
how to convert a data.frame to a list of dist objects for individual differences MDS?
I have a 45 x 16 data frame consisting of dissimilarities among 10
colors, giving in each
column the 45 = 10*9/2 pairwise judgments for one of 16 subjects. The
rownames
identify each pair of colors, e.g, "AC" = ("A","C"), and the pairs are
ordered by columns
in the lower triangle of each distance matrix.
> helm.raw <-
2006 Apr 06
1
interpreting anova summary tables - newbie
Hello,
Apologies if this is the wrong list, I am a first-time poster here. I
have an experiment in which an output is measured in response to 42
different categories.
I am only interested which of the categories is significantly different
from a reference category.
Here is the summary of the results:
summary(simple.fit)
Call:
lm(formula = as.numeric(as.vector(TNFa)) ~ Mutant.ID, data =
2008 Feb 19
4
[LLVMdev] 2008-01-25-ByValReadNone.c Failure
Hi all,
I'm seeing this failure on my PPC G4 box running TOT with llvm-gcc
4.2. Is anyone else seeing this? I'm sure it's related to the byval
stuff that's recently gone into LLVM. I'm attaching the output of
this command:
$ llvm-gcc -emit-llvm -O3 -S -o - -emit-llvm /Users/wendling/llvm/
llvm.src/test/CFrontend/2008-01-25-ByValReadNone.c
As you can see in it, there
2008 Mar 25
1
Subset of matrix
Dear R users
I have a big matrix like
6021 1188 790 290 1174 1015 1990 6613 6288
100714
6021 1 0.658 0.688 0.474 0.262 0.163 0.137 0.32
0.252 0.206
1188 0.658 1 0.917 0.245 0.331 0.122 0.148 0.194
0.168 0.171
790 0.688 0.917 1 0.243 0.31 0.122 0.15 0.19
0.171 0.174
290 0.474