Displaying 9 results from an estimated 9 matches for "protime".
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2011 Apr 20
2
survexp with weights
...el, with the addition
of a "weights=albumin" argument (I only chose albumin because it had
no missing values, not because of any real relevance). Below are my
code with the resulting error messages. Thanks in advance!
> pfit <- coxph(Surv(time,status>0) ~ trt + log(bili) + log(protime) + age +
+ + platelet, data=pbc
+ )
>
> pfit
Call:
coxph(formula = Surv(time, status > 0) ~ trt + log(bili) +
log(protime) +
age + +platelet, data = pbc)
coef exp(coef) se(coef) z p
trt -0.000624 0.999 0.17304 -0.00360 1.0000
log(b...
2006 Sep 03
2
Running cox models
...ml
(Primary Biliary Cirrhosis data link at top of the page),
I'm using the following code:
--------------- start of code
library(survival)
liver <- scan("liver2.txt",list(age=0,albumin=0,alkphos=0,ascites=0,bili=0,
cholest=0,edema=0,edmadj=0,hepmeg=0,obstime=0,platelet=0,protime=0,
sex=0,sgot=0,spiders=0,stage=0,status=0,treatmnt=0,
triglyc=0,urinecu=0))
fit<-coxph(Surv(obstime,status)~bili+edmadj+albumin+protime+age,data=liver)
summary(fit)
----------------- End of code
but the answer is rather different from that in the book (p.688 - for
anyone with t...
2008 Nov 21
1
Discrepancy in the regression coefficients for Cox regression - PBC data set
...s
PBC data set (given in the "survival" package), the regression coefficients
do not agree with the results presented in Table 4.6.3 (p. 195) of Fleming &
Harrington's book.
library(survival)
data(pbc)
ans.cox <- coxph(Surv(time, status) ~ log(bili) + log(alb) + age +
log(protime) + edema)
ans.cox
> ans.cox <- coxph(Surv(time, status) ~ log(bili) + log(alb) + age +
log(protime) + edema)
> ans.cox
Call:
coxph(formula = Surv(time, status) ~ log(bili) + log(alb) + age +
log(protime) + edema)
coef exp(coef) se(coef) z p
log(bili)...
2008 Nov 24
1
Discrepancy in the PBC data set
...'hepato', 'spiders', 'edema',
'bili', 'chol', 'albumin', 'copper',
'alk.phos', 'ast', 'trig', 'platelet',
'protime', 'stage'),
na.strings='.')
pbc$age <- pbc$age/365.25
newfit <- coxph(Surv(time, status==2) ~ age + edema + log(bili) +
log(protime) + log(albumin), data=pbc)
newfit
coef exp(coef) se(coef) z p
age 0.0396 1.0404...
2010 Sep 13
0
using survexp and ratetable with coxph object that includes a factor term
...ratetable argument to
survexp in the survival package. I use
the example from the ?survexp help page below,
and then slightly modify it to produce an error.
library(survival)
data(pbc)
#fit a model without any factors
pfit1 <- coxph(Surv(time, status > 0) ~ trt + log(bili) +
log(protime) + age + platelet, data=pbc)
#this works as expected
survexp(~ trt, ratetable = pfit1, data = pbc)
#now I fit a similar model, simply adding the 'sex' term
#note sex is now the only factor in the model
pfit2 <- coxph(Surv(time, status > 0) ~ trt + log(bili) +
log(protime...
2004 Dec 08
2
NEC Univerge
hi * users,
anyone out there ever come across, worked with or heard anything about
NEC's Univerge SV7000 Telephony Server? Link is at
http://www.univerge.nec.com/products/list/sv7000/sv7000.html
I'm just wondering whether it's as flexible, programmable and
configurable as Asterisk.
It also looks like they've got a whole range of IP phones
2003 Aug 04
1
coxph and frailty
...roup[id>=200 & id<250] <- 5
group[id>=250 & id<300] <- 6
group[id>=300] <- 7
I estimate the following model, using the Pbc data (with time-varying
covariates) from Therneau and Grambsch's book:
fitf <- coxph(Surv(start,stop,event==2) ~ age + log(bili) + log(protime) +
log(albumin) + edema + frailty(group),
na.action=na.exclude, data=Pbcseq)
Then I obtain:
> fitf[10]
$frail
[1] 0.06273372 0.16192093 0.10050877 0.37716999 -0.20853156 -0.71887977
[7] -0.10922275
And:
> fitf[11]
$fvar
[1] 0.03631634...
2008 Jul 01
1
Help on Analysis of covariance
Dear All,
Kindly tell me the steps to perform analysis of covariance (ANCOVA). Can I find anything in the help(). My prime objective is to analyze the genotypic and phenotypic correlation coefficients.
Thanks,
Partha
Partha Protim Banerjee, Ph. D.
Scientist - Corn Breeding
Hytech Seed India Pvt. Ltd.
ICRISAT, Bldg: 303, Room: 15-23
Patancheru, Hyderabad
India
p.banerjee@hytechseed.in
+91
2008 Feb 15
12
Transfer Crosstable to Word-Document
# Dear list,
# I am an R-beginner and
# spent the last days looking for a method to insert tables produced
# with R into a word document. I thought about SPPS: copy a table from
# an SPO-file and paste it into a word document
# (if needed do some formatting with that table).
# Annother idea was, to produce a TEX-file,
# insert it and make it a word-table.
# I found the following libraries, which