search for: nidhik

Displaying 9 results from an estimated 9 matches for "nidhik".

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2008 Dec 26
3
Simulating dataset using Parallel Latent CTT model?
...ow the correct way to simulate the dataset Thanks in Advance Regards, Nidhi Kohli *************************************** Nidhi Kohli, M.Ed. Doctoral Student Department of Measurement, Statistics and Evaluation University of Maryland 1230 Benjamin Building College Park, MD 20742-1115 e-mail: nidhik at umd.edu
2009 Mar 22
1
Converting Matrix into List - problem (urgent)
...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 Benjamin Building College Park, MD 20742-1115 e-mail: nidhik at umd.edu
2009 Feb 06
4
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 that I downloaded for my research work. I want to upgrade my R program with those packages in it. Is
2009 Jan 15
2
Interface to open source Reporting tools
...U > project to GNU/Linux, though it's no doubt to late to insist on the full > name.... > > [[alternative HTML version deleted]] > > > > ------------------------------ > > Message: 7 > Date: Sat, 10 Jan 2009 11:15:00 -0500 (EST) > From: Nidhi Kohli <nidhik@umd.edu> > Subject: [R] Print specific matrix value??? > To: r-help@r-project.org > Message-ID: <20090110111500.BIN51794@po3.mail.umd.edu> > Content-Type: text/plain; charset=us-ascii > > Hello All, > > I'm trying to print specific row and column for Observed_Sc...
2009 Jan 28
2
t.test in a loop
Hi All, I've been having a little trouble with creating a loop that will run a a series of t.tests for inspection, Below is the code i've tried, and some checks i've looked at. I've used the get(paste()) idea as i was told previously that the use of the eval should try and be avoided. I've run a single syntax to check that my systax is correct and works without any problems
2009 Jan 28
0
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 can't go backwards now. Is there a way i can still use Stack? Please see the program:
2009 Nov 05
1
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 my simulation code and tell me what mistake I am making in generating data for spline model? Thank you
2009 Jan 10
2
Print specific matrix value???
Hello All, I'm trying to print specific row and column for Observed_Scores matrix, however, when I execute the command "Observed_Scores[1,1]", I get the message "Error in Observed_Scores[1, 1] : incorrect number of dimensions". Could you please help and let me know where is the mistake? Here is my program: library(ltm) library(psych) # Settting the working directory
2009 Jan 28
1
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 can't go backwards now. Is there a way i can still use Stack? Please see the program: