katoms function

Atoms of Knowledge Structures

Computes atoms of knowledge structures.

katoms(x, items)

Arguments

• x: An object of class kstructure or kbase.
• items: A set of items for which atoms are computed.

Details

For any item q of the knowledge domain Q, an atom at q

is a minimal knowledge state containing q, where minimal refers to the fact that the respective knowledge state is not the union of any other knowledge states.

Returns

A list where each element represents the atom(s) of one item specified in items.

References

Doignon, J.-P., Falmagne, J.-C. (1999) Knowledge Spaces. Heidelberg: Springer Verlag.

See Also

kstructure, set

Examples

kst <- kstructure(set(set("a"), set("a","b"), set("a","c"), set("d","e"), 
   set("a","b","d","e"), set("a","c","d","e"), set("a","b","c","d","e")))
katoms(kst, items=set("a","b","c"))