search for: byar

Displaying 9 results from an estimated 9 matches for "byar".

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2009 May 04
1
Nelson-Aalen estimator of cumulative hazard
...hey should be identical. However, they are not. Their difference is a monotonically increasing with time. This difference is probably not large to make any impact in the application, but is annoyingly non-trivial for me to just ignore it. This is a competing risks problem, with the Green & Byar (1980) data set (the STATA data set is attached). Can anyone explain to me the reason for the discrepancy? require(foreign) gb <- read.dta("GB.dta") # Green & Byar data; N = 483 # Method 1 fit1 <- coxph( Surv(time, status=="Cancer" | status=="CVD" | st...
2002 May 21
2
weird winbind scenario
Hi, I have a box running Mandrake 8.2 and samba 2.2.4 on an NT domain. smbpasswd -j says it joins the domain ok, I use the included sys-auth-windbind file for pam, and the winbind entries are in nsswitch.conf. Everything appears to be running, but when I try wbinfo -u I get "Error looking up domain users". getent passwd only return the linux accounts. Yet wbinfo -t returns
2004 Feb 05
2
Incomplete Factorial design
...+ - Treatment A + a b - c ------- I am looking for functions in R to estimate the sample size and/or to conduct the analysis. I have just found an article from Byar in Statistics in Medicine for a 2^3 incomplete factorial design, but I would like not to discover again the wheel.. TIA dr. Giovanni Parrinello Section of Medical Statistics Department of Biosciences University of Brescia 25127 Viale Europa, 11 Brescia Italy Tel: +390303717528 Fax: +390303701157...
2005 Feb 14
3
Help, problems with permissions
Hi I am replacing my current mail system, using Exim/Postgres/WU-IMAP to another host using Dovecot. Everything has gone well, until I have tried to access some test mails via POP. The error message I am getting is Feb 14 03:03:57 wpc1273 pop3(simonw at orion-w-t.co.uk): lstat (/home/dovecot/users/orion-w-t.co.uk/simonw/cur) failed: Permission denied Feb 14 03:03:57 wpc1273 pop3(simonw at
2009 Jan 15
1
Confidence Intervals for Poisson
Hi folks! I run the following code to get a CI for a Poisson with lambda=12.73 library(MASS) set.seed(125) x <- rpois(100,12.73) lambda_hat<-fitdistr(x, dpois, list(lambda=12))$estimate #Confidence Intervals - Normal Approx. alpha<-c(.05,.025,.01) for(n in 1:length(alpha)) { LowerCI<-mean(x)-(qnorm(1-alpha[n]/2, mean = 0, sd = 1)*sqrt(var(x)/length(x)))
2002 May 23
1
Regenerate MACHINE.SID
I goofed adding some machines to my domain so now I have to do it all over. I removed the secrets.tdb and MACHINE.SID files, but when I join the domain again, the MACHINE.SID is not regenerated. How do I force them to be correctly regenerated on 2.2.4? Here's what I'm doing: 1. kill smb and winbind 2. delete secrets.tdb and MACHINE.SID 3. remove from NT4 PDC 4. add machine to NT4 PDC 5.
2003 Apr 03
1
samba 3 as a pretend DC?
Hi, I'm stuck in a network enviroment where ADS has taken over and by the end of the year the main DC's will only allow kerberos authentication. The problem is I have several legacy systems that are equipment controllers that can't be upgraded. They are running everything from OS/2 to NT4. So I need something for them to authenticate against using Lanman/NTLM/etc. Would it be
2003 Dec 03
1
net rpc vampire is sucking my brain!
Trying to migrate NT4 to samba 3.0.0 or 3.0.1pre3 with an ldap backend. I add a backup server account to the domain and joined. Getting the SID and the ldap init seem to work, and I start windbind. When I run net rpc vampire all I get is a ton of "Could not create posix account info for " errors. Then ofcourse pdbedit -L returns smbldap_search_suffix: Problem during the LDAP search:
2009 May 05
1
self organizing map advice for categorical data
...atters which method is used to handle ties in "coxph". The default is "efron". If I use method="breslow", there is no difference between the 2 different ways of computing the Nelson-Aalen estimte. require(foreign) gb <- read.dta("GB.dta") # Green & Byar data; N = 483 # Method 1 (note the use of Breslow estimator) fit1 <- coxph( Surv(time, status=="Cancer" | status=="CVD" | status=="Other") ~ 1, method="breslow", data=gb) h1 <- basehaz(fit1) # Method 2 fit2 <- survfit(Surv(time, status=="C...