[R] Simulate data for spline/piecewise regression model

Dear All, I am trying to simulate data for a spline/piecewise regression model. I am missing something fundamental in my simulation procedure because when I try to fit my simulated data using the Gauss-Newton method in SAS, I am getting some wacky parameter estimates. Can anyone please check

[R] Converting Matrix into List - problem (urgent)

row.names and col.names in the read.table function however getting error col.names object not found. I don't know what does this mean Regards, Nidhi Kohli *** Nidhi Kohli, M.Ed. Doctoral Student Department of Measurement, Statistics and Evaluation

[R] Converting Matrix into List - problem (urgent)

and col.names in the read.table function however getting error col.names object not found. I don't know what does this mean Regards, Nidhi Kohli *** Nidhi Kohli, M.Ed. Doctoral Student Department of Measurement, Statistics and Evaluation University of Maryland 1230

Re: [R] Converting Matrix into List - problem (urgent)

Regards Nidhi Original message Date: Sun, 22 Mar 2009 12:54:34 -0400 From: JiHO jo.li...@gmail.com Subject: Re: [R] Converting Matrix into List - problem (urgent) To: Nidhi Kohli nid...@umd.edu, R Help r-h...@stat.math.ethz.ch On 2009-March-22 , at 12:26 , Nidhi Kohli wrote

Re: [R] Converting Matrix into List - problem (urgent)

Kohli nid...@umd.edu Cc: R Help r-h...@stat.math.ethz.ch On 2009-March-22 , at 13:06 , Nidhi Kohli wrote: Thank you so much for the quick reply. Let me explain you what I want. I have a data file in the following format: 0.610251D+00 0.615278D+00 0.583581D+00 0.560295D+00 0.501325D+00

[R] Upgrade R program (version 2.6.2) ???

Hi All, I downloaded the R program (version 2.6.2) in last Jan 2008. I now want to upgrade the program to its latest version, but I don't want to go through the process of deleting the existing version and downloading the new version. This is because my existing R program has numerous packages

[R] Upgrade R program (version 2.6.2) ???

Hi All, I downloaded the R program (version 2.6.2) in last Jan 2008. I now want to upgrade the program to its latest version, but I don't want to go through the process of deleting the existing version and downloading the new version. This is because my existing R program has numerous packages

[R] stack data sets

Hi All, I'm generating 10 different data sets with 1 and 0 in a matrix form and writing the output in separate files. Now I need to stack all these data sets in one vector and I know that stack only operates on list or data frame however I got these data sets by converting list to a matrix so

[R] How to stack data sets?

Hi All, I'm generating 10 different data sets with 1 and 0 in a matrix form and writing the output in separate files. Now I need to stack all these data sets in one vector and I know that stack only operates on list or data frame however I got these data sets by converting list to a matrix so

[R] Print specific matrix value???

thresh.values = .5 * beta.values #for (i in 1:10) #{ #Using the function to generate the data GenData - congeneric.sim(N=500, loads = rep(.5,20), err=NULL, short = FALSE) Observed_Scores = GenData[1] Regards Nidhi Kohli __ R-help@r-project.org mailing

[R] Print specific matrix value???

thresh.values = .5 * beta.values #for (i in 1:10) #{ #Using the function to generate the data GenData - congeneric.sim(N=500, loads = rep(.5,20), err=NULL, short = FALSE) Observed_Scores = GenData[1] Regards Nidhi Kohli __ R-help@r-project.org mailing

Re: [R] Simulating dataset using Parallel Latent CTT model?

let me know how can I incorporate common error variance for 20 items in this R-program? Regards, Nidhi Kohli *** Nidhi Kohli, M.Ed. Doctoral Student Department of Measurement, Statistics and Evaluation University of Maryland 1230 Benjamin Building College