//!!!Similar code elsewhere
//There is likely similar code elsewhere
private IEnumerable <string> FindNonRedunantFeatures <T>(Matrix <string, string, T> matrixIn)
{
var goodRowList =
from rowKey in matrixIn.RowKeys
.AsParallel().WithParallelOptionsScope()
let row = matrixIn.RowView(rowKey)
let distinctValueList = row.Values.Distinct().ToList()
where distinctValueList.Count > 1
select rowKey;
var matrix2 = matrixIn.SelectRowsView(goodRowList);
//Creates a list of the alphabetically later duplicate row keys
var duplicateRowKey =
(
from rowKey1 in matrix2.RowKeys
.AsParallel().WithParallelOptionsScope()
let row1 = matrix2.RowView(rowKey1)
from rowKey2 in matrix2.RowKeys
where rowKey2.CompareTo(rowKey1) == 1
let row2 = matrix2.RowView(rowKey2)
where SpecialFunctions.DictionaryEqual(row1, row2)
select rowKey2
).ToHashSet();
return(matrix2.RowKeys.Except(duplicateRowKey));
}