Java Weka: How to Contruct a Missing Value -

Java Weka: How to Contruct a Missing Value -

i using weka java api. how set value missing in

instance.setvalue

i reading weka source , see

instance.missing_value

but protected. how represent missing value weka java?

the reply here on creating arff files.

http://weka.wikispaces.com/creating+an+arff+file

so illustration in clojure

(def missing-value (instance/missingvalue))

and java

double nan = instance.missingvalue();

java weka