[R] rules-class

From: Luis Felipe Parra <felipe.parra_at_quantil.com.co>
Date: Fri, 11 Jun 2010 12:31:50 -0500


Hellos I have a rules-class element which I got from the apriori function in the arules package, no I would like to stay just with a subset of the rules. Does anybody know how can I create an object which has only the subset corresponding from some indices I give him. For example if I have the followint rules-class object:

   lhs

rhs                                   support confidence      lift
1  {}                                  =>

{tarjetas_flagrancia.adquiriente2=} 0.9960369 0.9960369 1.0000000
2 {datafono.marca5=} =>
{tarjetas_flagrancia.adquiriente2=} 0.8049805 0.9984959 1.0024688
3 {Target=1} =>
{resultado_investig.pto_comp=N} 0.8134982 0.9991282 1.0427348
4 {Target=1} =>
{tarjetas_flagrancia.adquiriente2=} 0.8106589 0.9956411 0.9996026
5 {antecedentes.estado=1} =>
{antecedentes.medio=4} 0.8420383 1.0000000 1.1392183
6 {antecedentes.estado=1} =>
{tarjetas_flagrancia.adquiriente2=} 0.8382231 0.9954691 0.9994299
7 {antecedentes.factor_riesgo=17} =>
{antecedentes.riesgo=1} 0.8507926 1.0000000 1.1750886
8 {antecedentes.riesgo=1} =>
{antecedentes.factor_riesgo=17} 0.8507926 0.9997567 1.1750886
I would like my result to be the following rule-class object if I choose to stay with the third and eigth rules

   lhs

rhs                                   support confidence      lift

3  {Target=1}                          =>

{resultado_investig.pto_comp=N} 0.8134982 0.9991282 1.0427348
8 {antecedentes.riesgo=1} =>
{antecedentes.factor_riesgo=17} 0.8507926 0.9997567 1.1750886

Thank You

Felipe Parra

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