Method sortedCopy

JSAT/src/jsat/linear/SparseVector.java:288–314

()

    }

    @Override
    public Vec sortedCopy()
    {
        IndexTable it = new IndexTable(DoubleList.unmodifiableView(values, used));
        
        double[] newValues = new double[used];
        int[] newIndecies = new int[used];
        
        int lessThanZero = 0;
        for(int i = 0; i < used; i++)
        {
            int origIndex = it.index(i);
            newValues[i] = values[origIndex];
            if(newValues[i] < 0)
                lessThanZero++;
            newIndecies[i] = i;
        }
        //all < 0 values are right, now correct > 0 values
        for(int i = lessThanZero; i < used; i++)
            newIndecies[i] = length-(used-lessThanZero)+(i-lessThanZero);
        
        SparseVector sv = new SparseVector(length);
        sv.used = this.used;
        sv.values = newValues;
        sv.indexes = newIndecies;
        return sv;
    }
    
    /**
     * Returns the index of the last non-zero value, or -1 if all values are zero.