Displaying 5 results from an estimated 5 matches for "observed_scores".
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...
2009 Jan 28
1
stack data sets
...T 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.exams*n.items), nrow=n.exams, ncol=n.items)
Observed_Scores=matrix(rep(NA, n.exams*n.items), nrow=n.exams, ncol=n.items)
str(Observed_Scores)
for (k in 1:10)
{
#Setting the starting point for seed
set.seed(k)
#filling item parameters into beta.values
beta.values = runif(n.items,-2,2)
#Calculating Threshold
thresh.values = .5 * beta.values
#Using the functi...
2009 Jan 28
0
How to stack data sets?
...T 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.exams*n.items), nrow=n.exams, ncol=n.items)
Observed_Scores=matrix(rep(NA, n.exams*n.items), nrow=n.exams, ncol=n.items)
str(Observed_Scores)
for (k in 1:10)
{
#Setting the starting point for seed
set.seed(k)
#filling item parameters into beta.values
beta.values = runif(n.items,-2,2)
#Calculating Threshold
thresh.values = .5 * beta.values
#Using the functi...
2009 Jan 15
2
Interface to open source Reporting tools
...<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_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...
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