Hi,

Does anyone know what the negative indexing of a matrix mean?

 

I am using the RWeka and this evaluate classifier does not work on new
data like this

 

e <- evaluate_Weka_classifier(m1235,newdata=XW4, complexity =
FALSE,class = FALSE) 

 

while it work with negative indexing:

 

e <- evaluate_Weka_classifier(m1235,newdata=XW4[,-2], complexity =
FALSE,class = FALSE)

 

Although I do not understand what negative indexing of a matrix means,
or whether it produces any transformation.

 

Regards,

 

Itziar Frades

 


 
 
 
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