Description Usage Arguments Value Note Author(s) References See Also Examples
state2imp
transforms a set of knowledge states (ought to
be a quasi ordinal knowledge space) to the corresponding set of
implications (the surmise relation).
1 | state2imp(P)
|
P |
a required matrix of ones and zeros giving the knowledge states to be used. Each row represents the 1/0-pattern of a knowledge state. |
If the argument P
is of required type, state2imp
returns an object of class set
(the surmise
relation) representing the set of implications.
For any set of knowledge states the returned binary relation is a surmise relation. In case of a quasi ordinal knowledge space this is Birkhoff's theorem. For details refer to Doignon and Falmagne (1999, Theorem 1.49).
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, Ali Uenlue
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/.
imp2state
for transformation from implications to
knowledge states. See also DAKS-package
for general
information about this package.
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