hasse {DAKS} | R Documentation |
hasse
plots the Hasse diagram of a surmise relation (more
precisely, of its corresponding quotient set).
hasse(imp, items)
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 . |
If the arguments imp
and items
are of required types,
hasse
produces a plot, and returns a list of the equally
informative items.
The function hasse
is not capable of plotting equally
informative items. This is why equally informative items are
returned in a list.
A set of implications, an object of the class
set
, consists of 2-tuples (i, j) of
the class tuple
, where a 2-tuple
(i, j) is interpreted as `mastering item j implies
mastering item i.'
Anatol Sargin anatol.sargin@math.uni-augsburg.de, Ali Uenlue ali.uenlue@math.uni-augsburg.de
Doignon, J.-P. and Falmagne, J.-C. (1999) Knowledge Spaces. Berlin, Heidelberg, and New York: Springer-Verlag.
Sargin, A. and Uenlue, A. (2009) DAKS: An R package for data analysis in knowledge space theory. Manuscript submitted for publication. http://www.math.uni-augsburg.de/~uenlueal/
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.
hasse(iita(pisa, v = 2)$implications, 5)