Esempio n. 1
0
        public DualCompare(Dataset ds, int support)
        {
            int maxItem = ds.GetColumnCount();

            //dualStruct = new SortedList();
            dualStruct = new ISimpleItemset[maxItem, maxItem];

            for (int loopA = 0; loopA < maxItem; loopA++)
            {
                for (int loopB = 0; loopB < maxItem; loopB++)
                {
                    if (loopA != loopB)
                    {
                        Utils.FastSparseBitArray bitArray = ds.BuildBitVector(loopA, loopB);
                        int countElements = bitArray.CountElements();

                        if (countElements >= support)
                        {
                            ISimpleItemset itemset;
                            //if (ds.RowCount <= 64)
                            //	itemset = new ShortSimpleItemset();
                            //else
                            itemset = new SimpleItemset();

                            //itemset.AddItem(loopA);
                            //itemset.AddItem(loopB);
                            itemset.SetTransactions(bitArray);
                            //itemset.support = countElements;

                            dualStruct[loopA, loopB] = itemset;
                        }
                    }
                }
            }
        }
Esempio n. 2
0
        public void WriteResults(string dataFileName, Dataset dataset)
        {
            // Get columns
            int[] columns = new int[_itemset.Count];
            for (int i = 0; i < _itemset.Count; i++)
            {
                columns[i] = _itemset.GetItem(i);
            }

            // Get rows
            Utils.FastSparseBitArray rowsBits = _itemset.GetTransactions();
            int[] rows    = new int[_itemset.support];
            int   rowsPos = 0;

            for (int i = 0; i < dataset.RowCount; i++)
            {
                if (rowsBits.Get(i) == true)
                {
                    rows[rowsPos] = i;
                    rowsPos++;
                }
            }

            Dataset      subMatrix = dataset.GetSubMatrix(columns, rows);
            StreamWriter sw        = null;

            try
            {
                sw = new StreamWriter(dataFileName, false);
                subMatrix.SaveFile(sw);
            }
            finally
            {
                if (sw != null)
                {
                    sw.Close();
                }
            }
        }