ColumnSelector.Keys Method

Definition

Namespace: Numerics.NET.DataAnalysis.Schema
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 10.8.0

Overload List

Keys<C>(IEnumerable<C>) Creates a selector for the specified explicit column keys.
Keys<C>(C[]) Creates a selector for the specified explicit column keys.

Keys<C>(IEnumerable<C>)

Creates a selector for the specified explicit column keys.
C# 
public static ColumnSelector Keys<C>(
	IEnumerable<C> keys
)

Parameters

keys  IEnumerable<C>
The typed column keys.

Type Parameters

C
The element type of the data frame column index.

Return Value

ColumnSelector
A selector for keys.

Remarks

Duplicate keys are ignored after validation. Results are returned in schema order, not key-list order. Missing explicit keys throw KeyNotFoundException when the selector is resolved.

Exceptions

ArgumentNullExceptionkeys is null or contains a null key.

Keys<C>(C[])

Creates a selector for the specified explicit column keys.
C# 
public static ColumnSelector Keys<C>(
	params C[] keys
)

Parameters

keys  C[]
The typed column keys.

Type Parameters

C
The element type of the data frame column index.

Return Value

ColumnSelector
A selector for keys.

Remarks

Duplicate keys are ignored after validation. Results are returned in schema order, not key-list order. Missing explicit keys throw KeyNotFoundException when the selector is resolved.

Exceptions

ArgumentNullExceptionkeys is null or contains a null key.

See Also