Data
Definition
Namespace: Extreme.DataAnalysis
Assembly: Extreme.Numerics (in Extreme.Numerics.dll) Version: 8.1.23
Assembly: Extreme.Numerics (in Extreme.Numerics.dll) Version: 8.1.23
Overload List
| Group | Returns a hierarchical index consisting of the current index grouped by the specified column. |
| Group | Returns a hierarchical grouping consisting of the current index grouped by the specified grouping values. |
| Group | Returns a hierarchical grouping on two columns. |
DataFrame<R, C>.GroupBy<R1>(C)
Returns a hierarchical index consisting of the current index grouped
by the specified column.
public IGrouping GroupBy<R1>(
C columnKey
)
Parameters
- columnKey C
- The name of the grouping column.
Type Parameters
- R1
- The element type of the grouping column.
Return Value
IGroupingA hierarchical index.
DataFrame<R, C>.GroupBy<R1>(IList<R1>)
Returns a hierarchical grouping consisting of the current index grouped
by the specified grouping values.
public IGrouping GroupBy<R1>(
IList<R1> keys
)
Parameters
- keys IList<R1>
- A list with elements of type R1 that contains the values to group on.
Type Parameters
- R1
- The element type of the grouping vector.
Return Value
IGroupingA hierarchical index.
DataFrame<R, C>.GroupBy<R1, R2>(C, C)
Returns a hierarchical grouping on two columns.
public Grouping<(R1 , R2 )> GroupBy<R1, R2>(
C column1Key,
C column2Key
)
Parameters
Type Parameters
- R1
- The element type of the first grouping column.
- R2
- The element type of the second grouping column.
Return Value
Grouping<ValueTuple<R1, R2>>Exceptions
| Key | column1Key could not be found in the column index. -or- column2Key could not be found in the column index. |
| Invalid | The column with key column1Key could not be cast to a vector with element type R1 -or- The column with key column2Key could not be cast to a vector with element type R2 |