Data Frame<R, C>.Stack Method
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
Stack() | Returns a data frame containing all values in the data frame as row-column-value pairs. |
Stack<T>(IEnumerable<C>, IEnumerable<C>, C, C) | Converts a data frame from wide to long format. |
Stack
Returns a data frame containing all values in the data frame as row-column-value pairs.
public DataFrame<long, string> Stack()
Return Value
DataFrame<Int64, String>A data frame with three columns: one for the row index, one for the column index, and one for the value.
Remarks
Missing values are not recorded.
Stack<T>(IEnumerable<C>, IEnumerable<C>, C, C)
Converts a data frame from wide to long format.
public DataFrame<long, C> Stack<T>(
IEnumerable<C> idColumns,
IEnumerable<C> valueColumns,
C variableKey,
C valueKey
)
Parameters
- idColumns IEnumerable<C>
- A sequence of keys of the identifier columns, which remain unstacked.
- valueColumns IEnumerable<C>
- A sequence of keys of the value columns, which are stacked.
- variableKey C
- The key of the value column in the long data frame.
- valueKey C
- The key of the value column in the long data frame.
Type Parameters
- T
- The type of the elements of the value columns.
Return Value
DataFrame<Int64, C>A data frame with a column corresponding to each key in idColumns, a column for the key of the value columns, and a column for the value of the value columns.
Remarks
Missing values are not recorded.