Displaying 6 results from an estimated 6 matches for "ncme".
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2009 Jan 10
2
Print specific matrix value???
...ute 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 path to C:/NCME
path="C:/NCME"
setwd(path)
#IRT Data Simulation Routine#
n.exams = 500 #Sets number of examinees to be generated#
n.items = 20 #Sets number of items to be generated#
#The following intialize empty (NA) vectors or matrices#
beta.values = rep(NA,n.items)
resp.prob = matrix(rep(NA,...
2008 Dec 26
3
Simulating dataset using Parallel Latent CTT model?
I am trying to simulate a dataset using Parallel Latent CTT model and this is what i have done so far:
(START)
#Importing psych library for all the simulation related functions
library(psych)
# Settting the working directory path to C:/NCME
path="C:/NCME"
setwd(path)
#Using the function to generate the data
GenData <- congeneric.sim(N=500, loads = c(1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1), short = FALSE)
#Rounding upto 2 decimal places while showing the correlation matrix
round(cor(GenData$observed),2)
#Factor Scor...
2009 Jan 28
1
stack data sets
...ver 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:
#Importing psych & ltm library for all the simulation related functions
library(ltm)
library(psych)
# Settting the working directory path to C:/NCME
path="C:/NCME"
setwd(path)
#IRT Data Simulation Routine#
n.exams = 500 #Sets number of examinees to be generated#
n.items = 20 #Sets number of items to be generated#
#The following intialize empty (NA) vectors or matrices#
beta.values = rep(NA,n.items)
resp.prob=matrix(rep(NA, n.exa...
2009 Jan 28
0
How to stack data sets?
...r 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:
#Importing psych & ltm library for all the simulation related functions
library(ltm)
library(psych)
# Settting the working directory path to C:/NCME
path="C:/NCME"
setwd(path)
#IRT Data Simulation Routine#
n.exams = 500 #Sets number of examinees to be generated#
n.items = 20 #Sets number of items to be generated#
#The following intialize empty (NA) vectors or matrices#
beta.values = rep(NA,n.items)
resp.prob=matrix(rep(NA, n.exa...
2009 Jan 15
2
Interface to open source Reporting tools
...", 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 path to C:/NCME
>
> path="C:/NCME"
> setwd(path)
>
> #IRT Data Simulation Routine#
>
> n.exams = 500 #Sets number of examinees to be generated#
> n.items = 20 #Sets number of items to be generated#
>
> #The following intialize empty (NA) vectors or matrices#
> beta....
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