/// <summary>
/// Creates an DenseAnsi with values missing.
/// </summary>
/// <param name="rowKeySequence">A sequence of row keys. The items will become the RowKeys of the Matrix.</param>
/// <param name="colKeySequence">A sequence of colKeys. The items will come the ColKeys of the Matrix.</param>
/// <param name="missingValue">The special Missing value, which must be '?'</param>
/// <returns>A new, empty, DenseAnsi</returns>
static public DenseAnsi CreateEmptyInstance(IEnumerable <string> rowKeySequence, IEnumerable <string> colKeySequence, char missingValue)
{
Helper.CheckCondition(missingValue.Equals(StaticMissingValue), "For DenseAnsi the missingValue must be '{0}'", StaticMissingValue); //OK to use Equals because char can't be null
DenseAnsi denseAnsi = new DenseAnsi();
denseAnsi.InternalCreateEmptyInstance(rowKeySequence, colKeySequence);
return(denseAnsi);
}
