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xinmeng1/WekaProcessUnknownInfect.java

Last active February 27, 2016 23:57
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WEKA tipAdd value to an attribute in instances.For example:you create a instances from a csv. One of the attribute is name "Label" which is nominal type(maybe infect and normal).However the csv file only have normal label data. So when the instance created by the csv, the attribute only contain normal.@Attribute label {normal}.You need to add in…
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WekaProcessUnknownInfect.java
Instances normalFullData = normalFullLoad.getDataSet();
normalFullData.setClassIndex(normalFullData.numAttributes()-1);
//Add value "infect" to class attribute
AddValues filter = new AddValues();
filter.setLabels("infect");
boolean x = filter.setInputFormat(normalFullData);
normalFullData = Filter.useFilter(normalFullData, filter);
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WEKA tip
Add value to an attribute in instances.
For example:
you create a instances from a csv. One of the attribute is name "Label" which is nominal type(maybe infect and normal).
However the csv file only have normal label data. So when the instance created by the csv, the attribute only contain normal.
@Attribute label {normal}.
You need to add infect to this attribute:

Step by step:

  1. ceate a AddValues
  2. setLabels: you can add multiple labels in this which can be divided by "|", we only add infect, so filter.setLabels("infect")
  3. setAttributeIndex, if you want to change the last attribute in the instances, it is the default setting. so we don't set this
  4. setInputFormat(Instances x), input your instances
  5. Apply the filter to the instances
    Done!

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