Description Usage Arguments Details Value Author(s) References See Also Examples
Return the simplifying assumptions and contradictory simplifying assumptions.
1 2 3 4 5 6 7 |
object |
An object of class "QCA", which is return from |
... |
Not used currently |
object1 |
An object of class "QCA" with one solution. |
object0 |
An object of class "QCA" with one solution. |
x |
object of class 'QCA' explaining positive outcome. |
y |
object of class 'QCA' explaining negative outome. |
noCSA |
logical, show index of solutions without CSA only when TRUE. |
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.
For SA
and CSA
, the value is an object of class
c("SA","QCA"). It is a list of 8 components.
solutions |
a list of data frame.For SA, each data frame consists one set of simplifying assumptions of each solution. For CSA, it presents a set of contradictory simplifying assumptions. Each row of a data frame is one implicant. |
primeImplicants |
the same as that of object. |
explained |
the same as that of object for SA and object1 for CSA. |
idExclude |
the same as that of object for SA and object1 for CSA. |
nlevels |
the same as that of object for SA and object1 for CSA. |
PIChart |
the same as that of object for SA and object1 for CSA. |
call |
the same as that of object for SA and object1 for CSA. |
SAIDs |
a list of integer vector, corresponding grouping id of solutions component. |
Ronggui HUANG
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.
reduce
and constrReduce
1 2 3 4 5 6 7 8 9 10 11 12 13 | ## 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
findNoCSA(ans1,ans0,FALSE)
## End(Not run)
|
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