/**
* Uses the specified {@link Connections} object to Build the structural
* anatomy needed by this {@code TemporalMemory} to implement its algorithms.
*
* The connections object holds the {@link Column} and {@link Cell} infrastructure,
* and is used by both the {@link SpatialPooler} and {@link TemporalMemory}. Either of
* these can be used separately, and therefore this Connections object may have its
* Columns and Cells initialized by either the init method of the SpatialPooler or the
* init method of the TemporalMemory. We check for this so that complete initialization
* of both Columns and Cells occurs, without either being redundant (initialized more than
* once). However, {@link Cell}s only get created when initializing a TemporalMemory, because
* they are not used by the SpatialPooler.
*
* @param c {@link Connections} object
*/
public static void Init(Connections c)
{
SparseObjectMatrix <Column> matrix = c.GetMemory() ?? new SparseObjectMatrix <Column>(c.GetColumnDimensions());
c.SetMemory(matrix);
int numColumns = matrix.GetMaxIndex() + 1;
c.SetNumColumns(numColumns);
int cellsPerColumn = c.GetCellsPerColumn();
Cell[] cells = new Cell[numColumns * cellsPerColumn];
//Used as flag to determine if Column objects have been created.
Column colZero = matrix.GetObject(0);
for (int i = 0; i < numColumns; i++)
{
Column column = colZero == null ? new Column(cellsPerColumn, i) : matrix.GetObject(i);
for (int j = 0; j < cellsPerColumn; j++)
{
cells[i * cellsPerColumn + j] = column.GetCell(j);
}
//If columns have not been previously configured
if (colZero == null)
{
matrix.Set(i, column);
}
}
//Only the TemporalMemory initializes cells so no need to test for redundancy
c.SetCells(cells);
}
/**
* {@inheritDoc}
*/
public override List <EncoderResult> GetBucketInfo(int[] buckets)
{
SparseObjectMatrix <int[]> topDownMapping = GetTopDownMapping();
//The "category" is simply the bucket index
int category = buckets[0];
int[] encoding = topDownMapping.GetObject(category);
//Which input value does this correspond to?
double inputVal;
if (IsPeriodic())
{
inputVal = GetMinVal() + GetResolution() / 2 + category * GetResolution();
}
else
{
inputVal = GetMinVal() + category * GetResolution();
}
return(new List <EncoderResult> {
new EncoderResult(inputVal, inputVal, encoding)
});
}
private List <EncoderResult> GetEncoderResultsByIndex(SparseObjectMatrix <int[]> topDownMapping, int categoryIndex)
{
List <EncoderResult> result = new List <EncoderResult>();
string category = _sdrByCategory.GetCategory(categoryIndex);
int[] encoding = topDownMapping.GetObject(categoryIndex);
result.Add(new EncoderResult(category, categoryIndex, encoding));
return(result);
}