Displaying 20 results from an estimated 3000 matches similar to: "OT Futility Analysis"
2008 Oct 28
1
group sequential analysis - stopping for futility
Hello -
I am wondering if anyone has written some R code to calculate futility
bounds for a group sequential analysis of clinical trials data. The
library ldbounds has a function 'bounds' which calculates the
effectiveness stopping bounds for various spending functions, but it does
not appear to do the same for futility (sometimes called the 'inner
wedge').
Thanks for
2006 Mar 10
1
To improve my understanding of workspaces
Hello.
I have grown accustomed to the .Data directory in S-Plus and so when
I came to R I continued that behaviour by saving my workspaces at
the end of each R session. So, I have saved workspaces in various
directories where I have used R just as I would have had various
.Data directories where I had used S-Plus.
I have seen comments on the list, most recently from Prof. Ripley
that they
2006 Mar 16
1
Problem compiling R-Patched
I downloaded R-Patched today (to see if another problem I want to
ask about is still present or if its just me - as per the posting
guide). I ran "tools/rsync-recommended" successfully. I then ran
"configure --enable-R-shlib" successfully. Then make stops with the
following error.
gcc -shared -L/usr/local/lib -o tools.so text.o init.o Rmd5.o md5.o
-L../../../../lib -lR
2006 Apr 07
2
Why is transform="km" the default for cox.zph?
To enhance my understanding, and that of my students, 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
2006 Mar 16
0
Having trouble with plot.survfit and fun="cloglog"
I'm having trouble getting fun="cloglog" to work with plot on
a survfit object. Here are the data I used for the commands
that follow.
days status
2 0
2 0
5 1
9 0
14 1
16 0
16 0
17 0
29 1
30 0
37 1
37 0
39 1
44 0
44 0
58 0
60 1
67 1
68 1
82 1
82 1
86 0
86 0
89 1
93 0
97 1
100 0
100 0
100 0
> library(survival)
Loading required package: splines
> eg1.km <-
2008 Jan 08
0
PwrGSD
Hello List:
Please find uploaded to CRAN a new package, PwrGSD
The package is intended for the design and analysis of group sequential trials
There are two main functions,
(1) GrpSeqBnds: computes group sequential stopping boundaries for interim
analysis of a sequential trial based upon a normally distributed test
statistic. This can be done via the Lan-Demets procedure with
2008 Jan 08
0
PwrGSD
Hello List:
Please find uploaded to CRAN a new package, PwrGSD
The package is intended for the design and analysis of group sequential trials
There are two main functions,
(1) GrpSeqBnds: computes group sequential stopping boundaries for interim
analysis of a sequential trial based upon a normally distributed test
statistic. This can be done via the Lan-Demets procedure with
2002 Jul 10
1
Samba 2.2.4 make fails on Solaris 8 (Ultra Sparc III) using Sun F orte 6-update 2 compilers
Greetings!
During the Samba 2.2.4 make (using Sun WorkShop 6 update 2 C/C++ 5.3)on Sun
Fire 880
running Solaris 8, I get the following error:
Any pointers or help would be very much appreciated..
Thanks,
-Murali
{root}69: make
Using FLAGS = -O -D__EXTENSIONS__ -xtarget=ultra -xarch=v9b -I./popt
-Iinclude -I./inc
FILE_OFFSET_BITS=64 -DLOGFILEBASE="/usr/local/samba/var"
2002 Jul 11
1
Samba 2.2.4 make fails on Solaris 8 (Ultra Sparc III) using Sun Forte 6-update 2 compilers
Hi,
two weeks before, i had the same warnings, but no fatal errors and i got the
following answer von Gerald Carter:
> These are const warnings. Ignore them for now.
> (not that we don't care about them, but you should be ok).
Your compiler wants to compile nsswitch/wb_common.c with -Kpic. On Solaris
it has to be compiled with the option -fPic. Normaly the make-script looks
for the
2005 Aug 04
1
Problem configuring R-patched
I downloaded R-patched (2005-08-04) from CRAN today.
I ran ./configure --enable-R-shlib
I received the error message:
checking for recommended packages... no
configure: error: Some of the recommended packages are missing
Use --without-recommended-packages if this was intentional
I built a previous version of R-patched successfully on my system
which is running the SuSE 9,2 Pro Linux
2005 Jul 15
1
Cannot update some packages after upgrade to 2.1.1
I just upgraded to version 2.1.1 (from 2.0.1) today.
> R.version
_
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status
major 2
minor 1.1
year 2005
month 06
day 20
language R
I am using SuSE 9.2 and did the upgrade using rpm -U with the RPM
available on CRAN. After upgrading r-base, I ran update.packages().
Four previously
2018 May 04
0
Converting a list to a data frame
It looks like you made a copy/paste error below. Your ata.frame should
be data.frame.
Kevin
On 05/04/2018 08:18 AM, Bill Poling wrote:
> Good morning.
>
> Novice usR. Here.
>
> I am following this string, among many, learning as I go.
>
> Quick question please?
>
> I thought that perhaps ata.frame was part of the zoo pkg, b/c when I
> searched it came up in
2018 May 03
1
Converting a list to a data frame
>>>>> David L Carlson <dcarlson at tamu.edu>
>>>>> on Wed, 2 May 2018 21:43:52 +0000 writes:
> Typo: dat[[z]] should be x[[z]]:
>
> x2 <- do.call(rbind, lapply(names(x), function(z)
> data.frame(type=z, x[[z]])))
> x2
> type x y
> 1 A 1 3
> 2 A 2 4
> 3 B 5 7
> 4 B 6 8
>
>
2018 May 04
2
Converting a list to a data frame
Good morning.
Novice usR. Here.
I am following this string, among many, learning as I go.
Quick question please?
I thought that perhaps ata.frame was part of the zoo pkg, b/c when I searched it came up in help?
However, evidently not or I am not using it properly.
Please advise, thank you.
x <- list(A=data.frame(x=1:2, y=3:4),B=data.frame(x=5:6,y=7:8))
x2 <- do.call(rbind,
2005 Apr 05
4
Milestone
Well I now have a 4.0 server at a solid checkpoint. Before I start the
chore of setting up SAMBA and LDAP.
Part of the delay was I did not copy all of the needed DNS files, and I
have to reerad the BIND book.
So I want to be able to get to this point again easily.
I did not note down what options I had selected during install. Is there
some way in the install log to figure that out?
Is
2018 May 02
0
Converting a list to a data frame
Typo: dat[[z]] should be x[[z]]:
x2 <- do.call(rbind, lapply(names(x), function(z)
data.frame(type=z, x[[z]])))
x2
type x y
1 A 1 3
2 A 2 4
3 B 5 7
4 B 6 8
David C
-----Original Message-----
From: R-help <r-help-bounces at r-project.org> On Behalf Of David L Carlson
Sent: Wednesday, May 2, 2018 3:51 PM
To: William Dunlap <wdunlap at tibco.com>; Kevin E.
2010 Feb 17
8
Use of R in clinical trials
Dear all,
There have been a variety of discussions on the R list regarding the use of R in clinical trials. The following post from the STATA list provides an interesting opinion regarding why SAS remains so popular in this arena: http://www.stata.com/statalist/archive/2008-01/msg00098.html
Regards,
-Cody Hamilton
2018 May 02
0
Converting a list to a data frame
> x1 <- do.call(rbind, c(x, list(make.row.names=FALSE)))
> x2 <- cbind(type=rep(names(x), vapply(x, nrow, 0)), x1)
> str(x2)
'data.frame': 4 obs. of 3 variables:
$ type: Factor w/ 2 levels "A","B": 1 1 2 2
$ x : int 1 2 5 6
$ y : int 3 4 7 8
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Wed, May 2, 2018 at 10:11 AM, Kevin E. Thorpe
2003 Jan 03
2
maildirmake, shared folders
Does dovecot support shared folders, maildir style?
I've set it up, using the maildirmake from debian maildrop to create folders. I have a number of as-yet unresolved issues, so I haven't been able to test with many clients. It's interesting that dovecot manages to present folders as siblings (rather than children) of INBOX. But mutt, at least, doesn't seem to see the shared
2018 May 02
3
Converting a list to a data frame
Or add the type column first and then rbind:
x <- list(A=data.frame(x=1:2, y=3:4),B=data.frame(x=5:6,y=7:8))
x2 <- do.call(rbind, lapply(names(x), function(z)
data.frame(type=z, dat[[z]])))
----------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77843-4352
-----Original Message-----
From: R-help