search for: schoenfeld

hi sorry if this has been discussed before, but I'm wondering why the scaled Schoenfeld residuals do not follow the defining formula for obtaining them from the ordinary Schoenfeld residuals, but are instead offset by the estimated parameter values. e.g. library(survival) attach(ovarian) sv<-Surv(futime,fustat) f1<-coxph(sv~age+ecog.ps) f1 schres<-resid(f1,type="schoen...

Dear all, I am struggling with calculation of Schoenfeld residuals of my Cox Ph models. Based on the formula as attached, I calculated the Schoenfeld residuals for both non tied and tied data, respectively. And then I validated my results with R using the same data sets. However, I found that my results for non-tied data was ok but the results for tied...

Hi, I have a coxph model like coxph(Surv(start, stop, censor) ~ x + y, mydata) I would like to calculate the Schoenfeld residuals for the null, i.e the same model where the beta hat vector (in practical terms, the coeff vector spat out by summary()) is constrained to be all 0s --all lese stays the same. I could calculate it by hand, but I was wondering if there is a way of doing it with resid() -- resid(my.coxph.m...

...and obtained a straight line that pass through the origin. However, the formal test done by the R-function cox.zph, which is based on the plot of Schonefeld residuals against time, indicates that proportional hazards assumption is violated. Further, a plot of the score process (cumulative sums of schoenfeld residuals) against time again give the same conclusion as the cox.zph function and i am really stumped by this. Klein et al (1997, pp 354) mentioned that graphical checks for proportional hazards assumption is often preferred to formal test as formal test based on a large enough sample (in my case...

Dear All, Sorry to bother you again. I have a model: coxfita=coxph(Surv(rem.Remtime/365,rem.Rcens)~all.sex,data=nearma) and I'm trying to do a plot of Schoenfeld residuals using the code: plot(cox.zph(coxfita)) abline(h=0,lty=3) The error message I get is: Error in plot.window(...) : need finite 'ylim' values In addition: Warning messages: 1: In sqrt(x$var[i, i] * seval) : NaNs produced 2: In min(x) : no non-missing arguments to min; returning Inf...

Many questions goes in, Very few answers come out. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

...t... ...the log-file looks the same even if /usr/local/samba/bin/dfree does not exitst, ... a file loging each access to the dfree-script indicates that it was not runing and ... the same configuration worked fine with Samba 1.9.17p4. So what's my mistake? Thanks Andreas Schoenfeld --------------------------------------------------------------------------- "The hardest thing to understand is the income tax" -- Albert Einstein --------------------------------------------------------------------------- Andreas Schoenfeld E-Mail: Andreas@A-Schoenfeld...

Hello, Does the (core) designation in the CRAN Task View indicate packages that provide basic/recommended functionality in that domain? I don't see it documented anywhere on the site. Thanks for your help.

...will remove the config. shut down again, put the card back in, reboot, now kudzu see it, I choose "Ignore" and then it's working again (until the next reboot). I'm on WBEL 3.0 and the card is not sharing is IRQ. Is anybody else having this problem ? When kudzu see it (as a Jens Schoenfeld Intel 537), what should I choose ? Is there something I can do to prevent this from happening ? Thanks

...nts, I have a question about cox.zph in the survival package. If I have correctly gleaned the high-level point from the 1994 Biometrika paper of Grambsch and Therneau, it looks to me like cox.zph provides a mechanism to test for a simple trend in plots of a function of time, g(t) versus the scaled schoenfeld residuals and it also provides some built-in ones and the capability to provide your own. It also appears to me that different forms look at different departures from proportionality. So, my question is what are the advantages and disadvantages of the default transform="km" compared to...

...read only = No [firma.returnit] path = /mnt/srv/data/firma.returnit read only = No [install] path = /mnt/srv/data/firma.returnit read only = No [printers] comment = All Printers path = /var/spool/samba printer admin = Administrator, schoenfeld, root guest ok = Yes printable = Yes browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/drivers write list = root, schoenfeld, Administrator

I am porting a program in matlab to R, The problem is that Matlab has a feature where symbols that aren't arguments are evaluated immediately. That is: Y=3 F=@(x) x*Y Will yield a function such that F(2)=6. If later say. Y=4 then F(2) will still equal 6. R on the other hand has lazy evaluation. F<-function(x){x*Y} Will do the following Y=3 F(2)=6 Y=4 F(2)=8. Does anyone know of away to

Hello, I got error message when applying the plot function to the cox.zph object to create the Schoenfeld residual plots. > plot(zph.revasFit[1]) Error in plot.window(xlim, ylim, log, asp, ...) : need finite 'ylim' values In addition: Warning messages: 1: NaNs produced in: sqrt(x$var[i, i] * seval) 2: no non-missing arguments to min; returning Inf in: min(x) 3: no non-missing...

Package: xen-utils-common Version: 3.2.0-2 Severity: normal Hi, we have a setup with a system that has multiple ethernet interfaces. There is a interface eth2 which has an IP configured and is connected to the network and which is used to administrate that. Another iface is supposed to be used as netdev (eth0). This interface is unconfigured but connected to a network to which the DomUs are

Hi there, I'm currently evaluating the idea of a multi-master setup where each node shall hold a full copy of the mailboxes. Basically the idea is to use NFS and dsync to keep those copies in sync. So I did some tests with dsync and ran into a problem. Consider the following scenario: 1) Location1 and Location2 are in sync 2) A mail gets deleted on Location1 (via IMAP) 3) dsync mirror run to

...there by itself it works, but when I put the tdm400p in, there seems to be some sort of conflict with the network card. The tdm appears as another type of network card, which I don't think it should, should it? It shows up in lspci as 01:08.0 Network controller: Individual Computers - Jens Schoenfeld Intel 537. Does anyone know why this would be happening? Any help is greatly appreciated. Regards, Greg lspci with only network card in. [root@localhost root]# lspci 00:00.0 Host bridge: nVidia Corporation nForce2 AGP (different version?) (rev c1) 00:00.1 RAM memory: nVidia Corporation nForce...

...rs\\moshe\\colon\\rcut.r"). Invoke Error, Dispatch Exception: Object is static; operation not allowed I tried to get around this by using a script, but it doesn't work. I do not actually want to transfer the Surv output back to MATLAB, but rather allow R to plot some graphs, actually Schoenfeld residuals, which works fine within R, but I can't work out if R can be instructed to perform this analysis by MATLAB Does anyone know how? Thanks! [[alternative HTML version deleted]]

...UTO FXS/DPO Module 2: Installed -- AUTO FXO (FCC mode) Module 3: Installed -- AUTO FXO (FCC mode) Found a Wildcard TDM: Wildcard TDM400P REV E/F (4 modules) Registered tone zone 0 (United States / North America) 6. lspci -v shows: 0000:01:07.0 Communication controller: Individual Computers - Jens Schoenfeld Intel 537 Subsystem: Unknown device b100:0003 Flags: bus master, medium devsel, latency 32, IRQ 3 I/O ports at a400 Memory at f5001000 (32-bit, non-prefetchable) [size=4K] Capabilities: [40] Power Management version 2 and nothing else is running on IRQ 3. 7...

...v 26). IRQ 11. Master Capable. Latency=32. I/O at 0xd800 [0xd81f]. Bus 0, device 7, function 4: Host bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 64). IRQ 7. Bus 0, device 8, function 0: Network controller: Individual Computers - Jens Schoenfeld Intel 537 (rev 0). IRQ 17. Master Capable. Latency=32. Min Gnt=1.Max Lat=128. I/O at 0xdc00 [0xdcff]. Non-prefetchable 32 bit memory at 0xe4000000 [0xe4000fff]. Bus 0, device 13, function 0: Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone] (rev 36)...

Has anyone had successfully installed more then two digium wildcards in the same machine? I'm going for four. thanks Shoval Tomer, IT Manager, SofTov Advanced Systems, Ltd. Office: +972-3-9230686 ext. 179 Fax: +972-3-9216642 Mobile: +972-54-8000200