Re: [R] survival analysis: interval censored data

2011-09-28 Thread Ruth Arias
Thanks for taking time to answer this De: Terry Therneau Para: David Winsemius .org> Enviado: miércoles 28 de septiembre de 2011 23:03 Asunto: Re: [R] survival analysis: interval censored data David,   Thanks for taking time to answer this.   W

Re: [R] survival analysis: interval censored data

2011-09-28 Thread Terry Therneau
David, Thanks for taking time to answer this. When there are interval censored data, computation of the MLE first finds a minimal number of time points such that every interval with a death contains one of those points. Those are the points at which the final curve can have a jump. The alg

Re: [R] survival analysis: interval censored data

2011-09-28 Thread David Winsemius
On Sep 28, 2011, at 10:56 AM, Ruth Arias wrote: hallo terry: I attached araceae data set, The usual survival analysis via the Kaplan-Meier method only make estimates at the time of events. When you tabulate your data, you see that there were no events for the missing (starting) "time"

Re: [R] survival analysis: interval censored data

2011-09-28 Thread Ruth Arias
hallo terry: I attached araceae data set, when I use this: surara<-survfit(Surv(time,time2,event)~categoria) Call: survfit(formula = Surv(time, time2, event) ~ categoria)     records n.max n.start events median 0.95LCL 0.95UCL categoria=C  94    63   0 21 NA  NA 

Re: [R] survival analysis: interval censored data

2011-09-28 Thread Terry Therneau
You have still not given me enough information to reproduce your problem. "Why doesn't it include all years?" I have no way of knowing, since we have no data. --- begin included message -- halo david when I use type= 'interval' Call: survfit(formula = Surv(ingreso, fecha, estado, type = "inter

Re: [R] survival analysis: interval censored data

2011-09-27 Thread Ruth Arias
er Para: r-help@r-project.org Enviado: martes 27 de septiembre de 2011 7:06 Asunto: Re: [R] survival analysis: interval censored data Please adhere to the posting guide (i.e., provide a sample of self contained code and provide the error message). And what does "but it is not working" me

Re: [R] survival analysis: interval censored data

2011-09-26 Thread Daniel Malter
Please adhere to the posting guide (i.e., provide a sample of self contained code and provide the error message). And what does "but it is not working" mean? Is there an error code? rueu wrote: > > hello: > my data looks like: > time1  time2   event  catagoria > > 2004    2006        1         

[R] survival analysis: interval censored data

2011-09-26 Thread Ruth Arias
hello: my data looks like: time1  time2   event  catagoria 2004    2006        1            C 2004    2005        0            C 2005    2010        1            E 2007    2009        1            C 2006    2007        0            E 2008    2010        0            C 2008    2010