docs: public void findBestValEntropyNominalAtt(AutoExpandVector<DoubleVector> attrib, int attNumValues) {
  		ArrayList<ArrayList<Double>> distClassValue =  new ArrayList<ArrayList<Double>>();
  	//	System.out.print("attrib"+attrib+"\n");
  		for (int z = 0; z < attrib.size(); z++) {
  			distClassValue.add(new ArrayList<Double>());	
  		}
  		for (int v = 0; v < attNumValues; v++) {
  			DoubleVector saveVal = new DoubleVector();
  			for (int z = 0; z < attrib.size(); z++) {
  				if (attrib.get(z) != null) {
  					distClassValue.get(z).add(attrib.get(z).getValue(v));
  				} else {
  					distClassValue.get(z).add(0.0);
  				}
  				if(distClassValue.get(z).get(v).isNaN()) {
  					distClassValue.get(z).add(0.0);
  				}
  				saveVal.setValue(z, distClassValue.get(z).get(v));
  				}
  			double sumValue = saveVal.sumOfValues();
  			if (sumValue > 0.0) {
  				double entropyVal = entropy(saveVal);
  			    if (entropyVal <= this.minEntropyNominalAttrib) {
  			    	this.minEntropyNominalAttrib = entropyVal;
  			    	this.saveBestEntropyNominalAttrib.setValue(0, v);
  			    	this.saveBestEntropyNominalAttrib.setValue(1, entropyVal);
  			    	this.saveBestEntropyNominalAttrib.setValue(2, 0.0);
  			    	}
  			    }
  			}
  		}