[R] problem with RWeka Weka_control RandomForest

Achim Zeileis
Tue, 01 Dec 2009 17:10:05 -0000

On Tue, 1 Dec 2009, Itziar Frades Alzueta wrote:

> Dear All,
>
>
>
> I am finding trouble trying to guild a Wrapper using random forest to
> evaluate the subsets:
>
>
>
> I do:
>
> nombi <-
>
make_Weka_filter("weka/filters/supervised/attribute/AttributeSelection")
>
> datbin<- nombi(gene ~., data=X1X2X4X5W, control =Weka_control(
> S=list("weka.attributeSelection.GeneticSearch"),
> E=list("weka.attributeSelection.WrapperSubsetEval"),B >
list("weka.classifiers.trees.RandomForest")))
>
>
>
> I get the following error:
>
> Exception in thread "main" java.lang.Exception: Illegal options:
-B
> weka.classifiers.trees.RandomForest

The error is fairly explicit, isn't it? There is no -B option for
AttributeSelection, see
   WOW("weka/filters/supervised/attribute/AttributeSelection")

hth,
Z

>      at weka.core.Utils.checkForRemainingOptions(Unknown Source)
>
>      at
> weka.filters.supervised.attribute.AttributeSelection.setOptions(Unknown
> Source)
>
>
>
> I tryied specifying more parameters and got the same error:
>
>
>
> I do:
>
> datbin<- nombi(gene ~., data=X1X2X3X4W,  control =Weka_control(
> S=list("weka.attributeSelection.GeneticSearch"),
> E=list("weka.attributeSelection.WrapperSubsetEval"),B >
list("weka.classifiers.trees.RandomForest -F 5 -T 0.01 -R 1 -- -I 10 -K
> 0 -S 1")))
>
>
>
> I get the following error:
>
> Exception in thread "main" java.lang.Exception: Illegal options:
-B
> weka.classifiers.trees.RandomForest -F 5 -T 0.01 -R 1 -- -I 10 -K 0 -S 1
>
>
>      at weka.core.Utils.checkForRemainingOptions(Unknown Source)
>
>      at
> weka.filters.supervised.attribute.AttributeSelection.setOptions(Unknown
> Source)
>
>
>
>
>
>
>
>
>
>
>
>
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