simplifyingAssumption {QCA3}R Documentation

Simplyfing assumptions and contraditory simplifying assumptions

Description

Return the simplifying assumptions and contradictory simplifying assumptions.

Usage

simplifyingAssumption(object, ...) 
SA(object, ...) ## shortcut of simplifyingAssumption
CSA(object1, object0)

Arguments

object An object of class "QCA", which is return from reduce
... Not used currently
object1 An object of class "QCA" with one solution.
object0 An object of class "QCA" with one solution.

Details

Simplyfying assumption is assumption made on the outcome value of a logical remainder, so it can be included in the minimization procedure. Thus, it is meaning to use SA and CSA when the object is return by a call to reduce with remainder arugment set to "include".

A contraditory simplifying assumption (CSA) occurs when the same logical remainder is used both in the minization of the positive outcome configurations and in the minization of the negative outcome configuration. The CSA should be solved. An overly heavy presence of CSAs is one indicator of problem in the selection of conditions.

If can object of class "QCA" have multiple solutions, you can use [ to extract one of solution, then pass it to CSA. see example section for an example. For object1 and object0, one is the solution for explaination of positive case and the other is the solution for explaination of negative case.

Value

For SA and CSA, the value is an object of class c("SA","QCA"). It is a list of 8 components.

Author(s)

Ronggui HUANG

References

Yamasaki and Rihoux. 2009. A commented review of applications. In Configuraional comparative Methods: qualitative comparative analysis (QCA) and related techniques. ed by Benoit RiHoux and Charles Ragin. Sage.

See Also

reduce constrReduce

Examples

## Not run: 
data(Yamasaki,package="QCA")
cond <- names(Yamasaki)[1:5]
ans0 <- reduce(Yamasaki,"AGENDA",cond,"negative","include") ## 5 solutions 
ans1 <- reduce(Yamasaki,"AGENDA",cond,"positive","include") ## 1 solutions
SA(ans0)
SA(ans1)
CSA(ans0[1],ans1) ## no CSA, please note the subset operation
CSA(ans0[2],ans1) ## ans0[2]-ans0[5] have CSA
## End(Not run)

[Package QCA3 version 0.0-2 Index]