Method getMethod

JSAT/src/jsat/io/JSATData.java:210–271

(DataSet<Type> data, FloatStorageMethod method)

        abstract protected boolean noLoss(double orig);
        
        static public <Type extends DataSet<Type>> FloatStorageMethod getMethod(DataSet<Type> data, FloatStorageMethod method)
        {
            if (method == FloatStorageMethod.AUTO)//figure out what storage method to use! 
            {
                EnumSet<FloatStorageMethod> storageCandidates = EnumSet.complementOf(EnumSet.of(FloatStorageMethod.AUTO));

                //loop through all the data and remove invalid candidates
                for(int i = 0; i < data.getSampleSize(); i++)
                {
                    DataPoint dp = data.getDataPoint(i);
                    for (IndexValue iv : dp.getNumericalValues())
                    {
                        Iterator<FloatStorageMethod> iter = storageCandidates.iterator();
                        while (iter.hasNext())
                        {
                            if (!iter.next().noLoss(iv.getValue()))
                                iter.remove();
                        }
                        if (storageCandidates.size() == 1)
                            break;
                    }

                    Iterator<FloatStorageMethod> iter = storageCandidates.iterator();
                    while (iter.hasNext())
                    {
                        if (!iter.next().noLoss(dp.getWeight()))
                            iter.remove();
                    }
                    if (storageCandidates.size() == 1)
                        break;
                }
                
                if(data instanceof RegressionDataSet)
                {
                    for(IndexValue iv : ((RegressionDataSet)data).getTargetValues())
                    {
                        Iterator<FloatStorageMethod> iter = storageCandidates.iterator();
                        while (iter.hasNext())
                        {
                            if (!iter.next().noLoss(iv.getValue()))
                                iter.remove();
                        }
                        if (storageCandidates.size() == 1)
                            break;
                    }
                }
                
                if(storageCandidates.contains(BYTE))
                    return BYTE;
                else if(storageCandidates.contains(U_BYTE))
                    return U_BYTE;
                else if(storageCandidates.contains(SHORT))
                    return SHORT;
                else if(storageCandidates.contains(FP32))
                    return FP32;
                return FP64;