Re: [R] sas vs. R
On Sun, 2004-11-21 at 09:15 -0800, [EMAIL PROTECTED] wrote: I wish some of the corporations or universities that are using SAS would fund the R group a little, too. We do via the R Foundation! http://www.r-project.org/nosvn/foundation/memberlist.html Talk to the folks at your institutions... Marc Schwartz No longer a SAS user __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] sas vs r
On Wed, Apr 28, 2004 at 11:13:30AM +0200, Henric Nilsson wrote: At 05:24 2004-04-28, Liliana Forzani wrote: I have a code in sas (NLMIXED) and I have a hard time converting to r 1)it is poisson, with random intercept, but it have an offset. Means, I do not want one of the coefficient to be estimate. Means, may model is g(mean) = beta X + Z, Z fixed, X fixed and beta to be estimate I am using glmmML. If I recall correctly, neither glmmML nor glmmPQL (from MASS) handles offset terms. But GLMM in the lme4 package does. glmmML handles offset terms. I am pretty sure that glmmPQL does too. 2) the same but I have random slope (and I think with glmmML I can use only random intercept) GLMM in lme4 can do this. 3) I try to use nlme, is this equivalent to NLMIXED? No, nlme fits non-linear and linear mixed-effect models with Gaussian error terms. I hope this helps, Henric __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- Göran Broströmtel: +46 90 786 5223 Department of Statistics fax: +46 90 786 6614 Umeå University http://www.stat.umu.se/egna/gb/ SE-90187 Umeå, Sweden e-mail: [EMAIL PROTECTED] __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] sas vs r
At 11:39 2004-04-28, Göran Broström wrote: If I recall correctly, neither glmmML nor glmmPQL (from MASS) handles offset terms. But GLMM in the lme4 package does. glmmML handles offset terms. You're right. I confused it with glmmML's not being able to fit models with family = gaussian. Sorry. I am pretty sure that glmmPQL does too. glmmPQL doesn't complain about the offset term but ignores it. I guess that glmmPQL ignores offsets since lme, upon which glmmPQL depends, ignores offsets. //Henric __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] sas vs. r
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of wensui liu Sent: Friday, June 06, 2003 1:16 PM To: [EMAIL PROTECTED] Subject: [R] sas vs. r I like R more than SAS. My job is doing research on clinical trial. But I was told that FDA only accepts the result from SAS. Is that true? TOO BAD. See these recent posts by Frank Harrell: http://maths.newcastle.edu.au/~rking/R/help/03a/4210.html http://maths.newcastle.edu.au/~rking/R/help/03a/4231.html http://maths.newcastle.edu.au/~rking/R/help/03a/4246.html HTH, Marc Schwartz __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
Re: [R] sas vs. r
Please check http://www.r-project.org/; - search - R site search. My search just now for R vs. SAS for FDA produced 14 matches. My bottom line from reading comments on this issue is that it is like the comment 20 years ago that, Nobody in management ever got fired for buying IBM. The r-help archives include comments that FDA has no specific guidelines for what software must be used, although there are doubtless general guidelines relating to documentation and testing that it does what it claims. hth. spencer graves wensui liu wrote: I like R more than SAS. My job is doing research on clinical trial. But I was told that FDA only accepts the result from SAS. Is that true? TOO BAD. [[alternate HTML version deleted]] __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
Re: [R] sas vs. r
On Fri, 6 Jun 2003, wensui liu wrote: I like R more than SAS. My job is doing research on clinical trial. But I was told that FDA only accepts the result from SAS. Is that true? TOO BAD. No, it isn't true. The FDA does not approve or certify statistical software. Its main regulation relevant to statistical analysis is in 21 CFR 11, and is largely about audit trails. In fact the FDA is very reluctant to issue blanket approval or disapproval for anything -- it likes to keep its options open. On the other hand, if a company has been successful in getting FDA approval with analyses done one way, there is a substantial incentive not to change. Why take the risk that it might slow down the approval of your application? -thomas __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
Re: [R] sas vs. r
wensui liu [EMAIL PROTECTED] writes:
I like R more than SAS. My job is doing research on clinical
trial. But I was told that FDA only accepts the result from SAS. Is
that true? TOO BAD.
No. But it's not that simple.
See previous postings (within the last 2 months) on validation and
FDA.
best,
-tony
--
A.J. Rossini / [EMAIL PROTECTED] / [EMAIL PROTECTED]
Biomedical/Health Informatics and Biostatistics, University of Washington.
Biostatistics, HVTN/SCHARP, Fred Hutchinson Cancer Research Center.
FHCRC: 206-667-7025 (fax=4812)|Voicemail is pretty sketchy/use Email
CONFIDENTIALITY NOTICE: This e-mail message and any attachments ... {{dropped}}
__
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
