probtrace: Function to calculate probability trace lines
In xzhaopsy/MIRT: Multidimensional Item Response Theory
Description
Usage
Arguments
Author(s)
References
See Also
Examples
Description
Given an internal mirt object extracted from an estimated model
compute the probability trace lines for all categories.
Usage
1
probtrace(x, Theta)
Arguments
x
an extracted internal mirt object containing item information (see extract.item)
Theta
a vector (unidimensional) or matrix (unidimensional/multidimensional) of
latent trait values
Author(s)
Phil Chalmers rphilip.chalmers@gmail.com
References
Chalmers, R., P. (2012). mirt: A Multidimensional Item Response Theory
Package for the R Environment. Journal of Statistical Software, 48(6), 1-29.
doi: 10.18637/jss.v048.i06
See Also
Examples
1
2
3
4
5
6
7
8
9
10
## Not run:
mod <- mirt(Science, 1)
extr.2 <- extract.item(mod, 2)
Theta <- matrix(seq(-4,4, by = .1))
traceline <- probtrace(extr.2, Theta)
head(data.frame(traceline, Theta=Theta))
## End(Not run)
xzhaopsy/MIRT documentation built on May 29, 2019, 12:42 p.m.
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Description Usage Arguments Author(s) References See Also Examples
Description
Given an internal mirt object extracted from an estimated model compute the probability trace lines for all categories.
Usage
1 | probtrace(x, Theta)
|
Arguments
x |
an extracted internal mirt object containing item information (see |
Theta |
a vector (unidimensional) or matrix (unidimensional/multidimensional) of latent trait values |
Author(s)
Phil Chalmers rphilip.chalmers@gmail.com
References
Chalmers, R., P. (2012). mirt: A Multidimensional Item Response Theory Package for the R Environment. Journal of Statistical Software, 48(6), 1-29. doi: 10.18637/jss.v048.i06
See Also
Examples
1 2 3 4 5 6 7 8 9 10 | ## Not run:
mod <- mirt(Science, 1)
extr.2 <- extract.item(mod, 2)
Theta <- matrix(seq(-4,4, by = .1))
traceline <- probtrace(extr.2, Theta)
head(data.frame(traceline, Theta=Theta))
## End(Not run)
|
R Package Documentation
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We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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