Displaying 20 results from an estimated 3000 matches similar to: "Survival Curves"
2008 Mar 20
3
create matrix
Hi all,
I have a dataset consisting of 5 columns and over 5000 rows. Each row
gives information about an individual animal, including longevity, i.e.
at what age an animal died.
For the model I use I need to create n rows for each animal, n being its
longevity, and a new column 'survival' with a binary 0/1 outcome. When
an animal died e.g. at age 5, there have to be 5 rows of identical
2006 Feb 13
2
Survreg(), Surv() and interval-censored data
Can survreg() handle interval-censored data like the documentation
says? I ask because the command:
survreg(Surv(start, stop, event) ~ 1, data = heart)
fails with the error message
Invalid survival type
yet the documentation for Surv() states:
"Presently, the only methods allowing interval censored data are
the parametric models computed by 'survreg'"
2009 Mar 31
2
error message obtained when plotting survival curves (error not previously obtained)
Hello,
I now receive an error message when obtaining a survival plot, which
was not previously received with the same code. I recently updated
all my packages. It does not seem to be a peculiarity of my data as I
receive the error using data available in R. A plot is produced but I
am uncertain regarding the error message.
> library(surv2sample)
> data(gastric)
> fit <-
2010 Sep 23
2
extending survival curves past the last event using plot.survfit
Hello,
I'm using plot.survfit to plot cumulative incidence of an event.
Essentially, my code boils down to:
cox <-coxph(Surv(EVINF,STATUS) ~ strata(TREAT) + covariates, data=dat)
surv <- survfit(cox)
plot(surv,mark.time=F,fun="event")
Follow-up time extends to 54 weeks, but the last event occurs at week
30, and no more people are censored in between. Is there a
2013 Jan 31
1
obtainl survival curves for single strata
Dear useRs,
What is the syntax to obtain survival curves for single strata on many subjects?
I have a model based on Surv(time,response) object, so there is a single row per subject and no start,stop and no switching of strata.
The newdata has many subjects and each subject has a strata and the survival based on the subject risk and the subject strata is needed.
If I do
newpred <-
2008 Jul 18
1
DID - Panama
I need a low monthly rate DID in Panama.
Maybe 2-3 inbound calls a day max. 1-2 outbound calls a day only.
Will be rarely used but needs to be very good quality and needs
longevity of business (eg this number is going into print so company
needs to be around for a while).
Please email with rates and details.
Cheers,
Dean
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An HTML
2009 Feb 22
2
SSDs and filesystem alignment...
Does BTRFS perform any journal and/or filesystem structure alignment
(for benefit to SSD longevity and SSD, RAID array and large-sector
device performance) at present?
ext4''s Ted Tso will deliver 128KB alignment with the next release of
e2fsprogs (ie 1.41.4) [1], so perhaps it''s a good idea for btrfsprogs
also, if not already available?
Daniel
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2018 Feb 23
2
what is the centos/elrepo policy toward LTS kernels?
i'm sure there's a simple answer to this -- i already understand
that newer kernels than the ones shipped with the official release
aren't officially supported but there is the elrepo kernel repository
here:
http://elrepo.org/linux/kernel/el7/x86_64/RPMS/
with a mixture of long-term (lt) and mainline (ml) kernels. i assume
that the mainline kernels pretty closely track the latest
2019 May 17
3
is "list_del corruption" fix available in Centos ?
Hi,
Gentle reminder ! Please let me know if there are any pointers for this
Thanks
Santhosh
On Tue, May 14, 2019 at 7:26 PM santhosh kumar <santhosh.santuu at gmail.com>
wrote:
> Hi,
>
> We migrated from redhat 5.3 to centos 7.5 and facing crashes in longevity
> tests
>
> All of them point to below reason,
>
> list_del corruption. next->prev should be
2010 Feb 05
1
Using coxph with Gompertz-distributed survival data.
Dear list:
I am attempting to use what I thought would be a pretty straightforward practical application of Cox regression. I figure users of the survival package must have come across this problem before, so I would like to ask you how you dealt with it. I have set up an illustrative example and included it at the end of this post.
I took a sample of 100 data points from each of two populations
2007 May 07
1
Predicted Cox survival curves - factor coding problems..
The combination of survfit, coxph, and factors is getting confused. It is
not smart enough to match a new data frame that contains a numeric for sitenew
to a fit that contained that variable as a factor. (Perhaps it should be smart
enough to at least die gracefully -- but it's not).
The simple solution is to not use factors.
site1 <- 1*(coxsnps$sitenew==1)
site2 <-
2012 Jan 24
1
Plotting coxph survival curves
Hi,
I am attempting to plot survival curves estimated by cox proportional
hazards regression model. The formula for the model is this:
F.cox.weight <- coxph(Surv(Lifespan, Status) ~ MS + Weight + Laid + MS:Laid
+ Weight:Laid, data = LongF)
MS = Mating status (mated/virgin)
Weight = adult female weight, continuous covariate
Laid = number of eggs laid by each female, continuous covariate
I
2010 Dec 16
6
two cents or not two cents
Hello Producers
"Longevity of Support" is an attractive drawcard for CentOS if it means
the exact opposite of Fedora's "short support cycle" that does not
provide updating of infrastructural libraries for very long, libraries
which newer versions of applications (like Firefox, Thunderbird, Opera
etc) depend on and which wont install unless the libraries are also
newer
2012 Jul 21
1
Windows NUT shutdown UPS?
I was wondering what you guys do about UPS shutdown on Windows systems?
Apcupsd has the same issue, so I'm assuming it is the same with NUT.
Windows just makes it hard/impossible to do.
Do you find draining the batteries down so much cause issues for longevity?
Regarding my Eaton 5110, I found that automatic driver setup works just
fine on Windows XP but not at all on Windows 7 x64 (I
2017 Oct 07
2
Adjusted survival curves
For adjusted survival curves I took the sample code from here:
https://rpubs.com/daspringate/survival
and adapted for my date, but got error.
I would like to understand what is my mistake. Thanks!
#ADAPTATION FOR MY DATA
library(survival)
library(survminer)
df<-read.csv("F:/R/data/base.csv", header = TRUE, sep = ";")
head(df)
ID start stop censor sex age stage treatment
1
2012 May 04
1
ANOVA problem
Hi,
I need to create a data frame containing the results of a number of ANOVA's
but I'm having some trouble setting it up (some being enough for me to spend
3 days trying with no progress and be left staring in to the abyss which
some people call a weekend, and what I will call 2 quiet days in the
office...)
The response variable is *V*.
I need to do an ANOVA for each *G*.
The fixed
2017 Oct 07
2
Adjusted survival curves
For adjusted survival curves I took the sample code from here:
https://rpubs.com/daspringate/survival
and adapted for my date, but ... have a QUESTION.
library(survival)
library(survminer)
df<-read.csv("base.csv", header = TRUE, sep = ";")
head(df)
ID start stop censor sex age stage treatment
1 1 0 66 0 2 1 3 1
2 2 0 18 0 1 2 4 2
3 3 0 43 1 2 3 3 1
4 4 0 47 1 2 3 NA 2
5 5
2011 Jan 14
1
Survfit: why different survival curves but same parameter estimates?
Hello,
I'm trying to estimate a Cox proportional hazard model with time-varying covariates using coxph. The parameter estimates are fine but there is something wrong with the survival curves I get with survfit (results are not plausible).
Let me explain why I think something's wrong.
To make sure I'm setting up my data correctly to estimate a model with time-varying covariates, I
2011 Jul 15
1
Plotting survival curves from a Cox model with time dependent covariates
Dear all,
Let's assume I have a clinical trial with two treatments and a time to
event outcome. I am trying to fit a Cox model with a time dependent
treatment effect and then plot the predicted survival curve for one
treatment (or both).
library(survival)
test <-
list(time=runif(100,0,10),event=sample(0:1,100,replace=T),trmt=sample(0:1,100,replace=T))
model1 <- coxph(Surv(time,
2008 Oct 20
2
error message when plotting survival curves
I am trying to plot survival curves using the following code as an example:
>rs1799964.coxph<-(coxph(Surv(sassurvmonths,status)~age+stage+rs1799964_TNFA,method="efron"))
>plot(rs1799964.coxph,lyt=c(1,3),xlab="Survival in Months",ylab="Proportion
Surviving")
I am gettingthe following error message:
>Error in xy.coords(x, y, xlabel, ylabel, log) :