hasse plots the Hasse diagram of a surmise relation (more
precisely, of its corresponding quotient set).
Usage
hasse(imp, items)
Arguments
imp
a required object of class set
representing the set of implications, for instance obtained from a
call to iita.
items
a required numeric giving the number of items of the
domain taken as basis for imp.
Value
If the arguments imp and items are of required types,
hasse produces a plot, and returns a list of the equally
informative items.
References
Doignon, J.-P. and Falmagne, J.-C. (1999) Knowledge Spaces.
Berlin, Heidelberg, and New York: Springer-Verlag.
Uenlue, A. and Sargin, A. (2010) DAKS: An R package for data
analysis methods in knowledge space theory. Journal of Statistical
Software, 37(2), 1--31.
URL http://www.jstatsoft.org/v37/i02/.
See Also
iita, the interface that provides the three
inductive item tree analysis methods under one umbrella. See also
DAKS-package for general information about this
package.
## requires the package Rgraphviz from Bioconductor## users must have installed Graphviz on their computers## Not run: # hasse(iita(pisa, v = 2)$implications, 5)# ## End(Not run)