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Total 41 documents matching your query.

1. Fitting Binomial Responses (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Fri, 3 Oct 2003 13:22:21 +0100 (BST)
Dear S+ users, I have a data set with binomial resposnes. For the majority of the individuals the number of successes equals the number of the trials. As a result, the logit link produces Inf. Is the
/archives/html/s-news/2003-10/msg00030.html (7,165 bytes)

2. Problem in linking S.dll in S using VC++ 6.0 (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Thu, 17 Jul 2003 14:32:50 +0100 (BST)
Dear S+ users, I am trying to call a C++ routine (written in VC++ 6.0) from S. I am following the steps delineated in the Programmers guide and I manage to create the "S.dll" file. Then I copy this f
/archives/html/s-news/2003-07/msg00125.html (8,013 bytes)

3. Local Maximum (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Fri, 9 May 2003 18:12:46 +0100 (BST)
to
/archives/html/s-news/2003-05/msg00034.html (7,318 bytes)

4. Histogram of random-effects in lme models (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Thu, 10 Apr 2003 19:07:39 +0100 (BST)
(
/archives/html/s-news/2003-04/msg00070.html (7,485 bytes)

5. Re: Histogram of random-effects in lme models (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Thu, 10 Apr 2003 19:29:31 +0100 (BST)
l
/archives/html/s-news/2003-04/msg00071.html (7,593 bytes)

6. Re: contrasts in Cox prop hazards model (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Mon, 3 Mar 2003 17:54:38 +0000 (GMT)
Dear Theodore, you obtain the same results because in both: options(contrasts=c(factor="contr.treatment", ordered="contr.treatment")) options(contrasts=c(factor="contr.treatment", ordered="contr.poly
/archives/html/s-news/2003-03/msg00012.html (9,423 bytes)

7. Question for pdDiag in lme (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Tue, 18 Mar 2003 20:31:49 +0000 (GMT)
Dear S+ users, I have a dataset consisting of 54 patients. My response is ADL score. For 35 of them I have 3 measurements and for 19 I have 2 measurements. Firstly, I fit the model: model.lme2 <- upd
/archives/html/s-news/2003-03/msg00115.html (8,224 bytes)

8. Summary: Question for pdDiag in lme (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Wed, 19 Mar 2003 09:51:35 +0000 (GMT)
I would like to thank Dr. Renaud Lancelot, Dr. JosĪ¹ Pinheiro and Dr. Jake Bowers for their assistance. The solution to my problem was to use the following: model.lme2.2 <- update(model.lme1, + random
/archives/html/s-news/2003-03/msg00120.html (7,141 bytes)

9. Covariance matrix in gls models (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Mon, 24 Mar 2003 09:03:31 +0000 (GMT)
s. ** **
/archives/html/s-news/2003-03/msg00162.html (7,137 bytes)

10. Efficiency Question (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Wed, 4 Dec 2002 19:51:10 +0000 (GMT)
Dear S people, I would like to ask you the following: Let's suppose that I have a n*p matrix of p binary variables (n=number of observations) and a k*p matrix of probabilities. I want to compute the
/archives/html/s-news/2002-12/msg00034.html (7,765 bytes)

11. Summary: Efficiency Question (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Fri, 6 Dec 2002 13:23:55 +0000 (GMT)
I would like to thank Bill Dunlap, Scott D. Chasalow and Tim Hesterberg for their useful suggestions to my inquiry. Bill Dunlap's suggestion: g <- matrix(1.0, nrow=nrow(X), ncol=nrow(p)) for(k in 1:n
/archives/html/s-news/2002-12/msg00056.html (7,288 bytes)

12. Question for quasi-Newton algorithm (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Sat, 14 Dec 2002 12:15:05 +0000 (GMT)
Dear S people, I am using a quasi-Newton optimization algorithm in order to obtain the maximum likelihood estimates of a model. My algorithm uses an empirical hessian matrix give by "H=sum(outer(g,g)
/archives/html/s-news/2002-12/msg00110.html (7,682 bytes)

13. Question for GLMM (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Fri, 18 Oct 2002 09:00:49 +0100 (BST)
Dear S+ users, I?m working on a project which aims to relate the appearance of fungus (binary response: Iasi) with several demographic (age, BMI) and environmental (C1, C2) variables. The data were c
/archives/html/s-news/2002-10/msg00136.html (8,702 bytes)

14. Error Message in SPLUS 6.0 (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Thu, 12 Sep 2002 16:29:41 +0100 (BST)
Dear S+ users, I have created a function to perform All Possible Subsets regression. This function works well in S-PLUS 2000 Release 1 for Windows, but when I try it in S-PLUS 6.0 Release 2 for Windo
/archives/html/s-news/2002-09/msg00088.html (7,240 bytes)

15. Error in S-PLUS 6.0 (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Mon, 16 Sep 2002 07:39:09 +0100 (BST)
Dear S+ users, the following function works well in S-PLUS 2000 Prof. Release 1 for Windows, but in S-PLUS 6.0 Release 2 for Windows it gives the following error message: Problem: internal error: try
/archives/html/s-news/2002-09/msg00104.html (8,767 bytes)

16. Summary: Error in S-PLUS 6.0 (score: 1)
Author: Dimitris Rizopoulos <jimsailgr@yahoo.gr>
Date: Tue, 17 Sep 2002 18:27:53 +0100 (BST)
I would like to thank Tony Plate, David Smith and Susan Rasch for their usefull comments. Susan Rasch from Insightful Technical Support told me that the problem occured in my function it might be a b
/archives/html/s-news/2002-09/msg00119.html (7,154 bytes)

17. scope rules for 'safe.predict.gam' (score: 1)
Author: "Dimitris C. Rizopoulos" <jimsailgr@yahoo.gr>
Date: Tue, 6 Aug 2002 05:54:25 +0100 (BST)
Dear S+ users, When I use the following function with ?lm? or ?glm? models it works fine, but when I try it with ?gam? models it fails: my.f <- function(data, models){ n <- nrow(data) results <- vect
/archives/html/s-news/2002-08/msg00031.html (8,114 bytes)

18. Question about "For" (score: 1)
Author: "Dimitris C. Rizopoulos" <jimsailgr@yahoo.gr>
Date: Thu, 8 Aug 2002 16:09:08 +0100 (BST)
Dear S+ users, I cannot understand why the following isn't working: x <- 1:10 y <- numeric(10) z <- numeric(10) for(i in 1:10) y[i] <- cos(x[i]) For(i=1:10, z[i] <- cos(x[i])) y;z [1] 0.5403023 -0.41
/archives/html/s-news/2002-08/msg00059.html (7,276 bytes)

19. Question for S scope rules (score: 1)
Author: "Dimitris C. Rizopoulos" <jimsailgr@yahoo.gr>
Date: Thu, 4 Jul 2002 17:33:50 +0100 (BST)
Dear splus users, { n <- length(x) lis <- vector(length = n, mode = "list") for(i in 1:n) { lis[[i]] <- lapply(1:10, function(k) x[i] + rnorm(1)) } unlist(lis) } Error: Object "i" not found The purpo
/archives/html/s-news/2002-07/msg00019.html (7,765 bytes)

20. Summary: Question for S scope rules (score: 1)
Author: "Dimitris C. Rizopoulos" <jimsailgr@yahoo.gr>
Date: Fri, 5 Jul 2002 09:42:39 +0100 (BST)
I would like to thank Bill Venables, Nick Ellis, Dennis J. Murphy, Patrick Burns, Brad Mann, Renaud Lancelot and Gabriel Baud-Bovy, for their useful replies. The answer to my problem was to use the f
/archives/html/s-news/2002-07/msg00023.html (7,422 bytes)

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