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Total 10 documents matching your query.

1. Multinomial logistic regression with nnet library (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Tue, 13 Jun 2006 14:50:27 -0500
I am using S-Plus 7.0 to model a polychotomous response variable. Using the multinom() function of the nnet library, I am able to get the following fit: Call: multinom(formula = me ~ hist) Coefficien
/archives/html/s-news/2006-06/msg00021.html (8,498 bytes)

2. Partial proportional odds model (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Wed, 12 Jul 2006 12:17:57 -0500
Peterson and Harrell (Appl Stat 1990; 39: 205-17) describe constrained and unconstrained partial proportional odds models for ordinal logistic regression. I would like to explore these models in a da
/archives/html/s-news/2006-07/msg00022.html (7,088 bytes)

3. Sample size for logistic regression with multiple covariates (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Wed, 9 Aug 2006 16:18:20 -0500
I am designing a mouse experiment for testing a new treatment for bladder cancer. The idea is to evaluate treatment effectiveness and treatment by gene interactions. The variables are: Outcome (Y): b
/archives/html/s-news/2006-08/msg00026.html (7,763 bytes)

4. Customizing 'plot.summary.Design' (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Sat, 9 Sep 2006 16:31:26 -0500
I have constructed a multivariate logistic regression model using lrm from the Design library: fit <- lrm(y ~ x1 + x2, data=mydata) When I plot the summary of this fit, I get a very nice plot with sh
/archives/html/s-news/2006-09/msg00022.html (8,011 bytes)

5. Importing SPSS files (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Wed, 18 Oct 2006 17:21:19 -0500
I am running R 2.3.1 and SPSS 14.0.1 on a Windows XP computer. When I import SPSS .sav datafiles into R using either the "spss.get" function of the Hmisc library or the "read.spss" function of the fo
/archives/html/s-news/2006-10/msg00028.html (7,323 bytes)

6. Problem with importing data (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Mon, 23 Oct 2006 13:44:44 -0500
I am using S-Plus professional developper 7.0.6 for Windows XP. I recently tried using the GUI to import data and I got the following error message. Does anyone have an idea how to solve this? Brant
/archives/html/s-news/2006-10/msg00038.html (15,386 bytes)

7. Additional details: Problem with import data (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Mon, 23 Oct 2006 15:36:21 -0500
My previous posting did not contain enough detail, so I am supplying it here to clarify. I am trying to import data using the S-Plus 7.0 GUI menu system. When I select " File > Import Data > From Fil
/archives/html/s-news/2006-10/msg00039.html (8,640 bytes)

8. FW: Additional details: Problem with import data (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Mon, 23 Oct 2006 15:57:06 -0500
received 3 speedy replies, all diagnosing the same problem: a corrupt .prefs folder. I proceeding to delete the folder in the manner described by Keith Nieford below. This completely solved the prob
/archives/html/s-news/2006-10/msg00040.html (14,154 bytes)

9. Running script in S-Plus (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Wed, 25 Oct 2006 17:02:01 -0500
In the R environment, I use "control-R" to run a single line of code (i.e. not the entire script file), something that I find most convenient. In the S-Plus 7.0.6 for Windows environment that I use,
/archives/html/s-news/2006-10/msg00049.html (7,395 bytes)

10. Interpretation of 'interquartile effects' in summary.lrm (score: 1)
Author: "Inman, Brant A. M.D." <Inman.Brant@mayo.edu>
Date: Mon, 27 Nov 2006 22:36:51 -0600
I am using the Design and Hmisc libraries to fit a logistic regression model in a manner similar to that given below (note that this model may not make sense, I just use it to demonstrate my questio
/archives/html/s-news/2006-11/msg00043.html (8,730 bytes)

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