/** Split and return test or train instances. */
Instances split(Instances data, boolean invert, boolean removeAttribute) throws Exception {
super.setInvertSelection(invert);
super.setNominalIndicesArr(toValueIndexArray(getAttribute(data)));
final Filter filter;
if (!removeAttribute) filter = this;
else {
Remove remove = new Remove();
remove.setAttributeIndices(super.getAttributeIndex());
MultiFilter mf = new MultiFilter();
mf.setFilters(new Filter[] {this, remove});
filter = mf;
}
filter.setInputFormat(data);
return Filter.useFilter(data, filter);
}
@Override
public boolean setInputFormat(Instances instanceInfo) throws Exception {
super.setNominalIndicesArr(toValueIndexArray(getAttribute(instanceInfo)));
return super.setInputFormat(instanceInfo);
}