DataFrame<R, C>.Map Method

Definition

Namespace: Extreme.DataAnalysis
Assembly: Extreme.Numerics (in Extreme.Numerics.dll) Version: 8.1.23

Overload List

Map(IList<C>, Func<IVector, IVector>, IList<C>) Applies the specified function to selected columns and returns the result in a new data frame.
Map(IList<C>, Func<IVector, IVector>, Func<C, C>) Applies the specified function to selected columns and returns the result in a new data frame.
Map<T>(Func<Vector<T>, IVector>) Applies the specified function to all columns with the specified element type and returns the result in a new data frame.
Map<T>(IList<C>, Func<Vector<T>, IVector>, IList<C>) Applies the specified function to selected columns.
Map<T>(IList<C>, Func<Vector<T>, IVector>, Func<C, C>) Applies the specified function to selected columns.

DataFrame<R, C>.Map<T>(Func<Vector<T>, IVector>)

Applies the specified function to all columns with the specified element type and returns the result in a new data frame.
C# 
public DataFrame<R, C> Map<T>(
	Func<Vector<T>, IVector> function
)

Parameters

function  Func<Vector<T>, IVector>
The function to apply.

Type Parameters

T
The element type of the columns that function is applied to.

Return Value

DataFrame<R, C>
A new data frame that has every column with element type T replaced with function applied to that column.

DataFrame<R, C>.Map(IList<C>, Func<IVector, IVector>, IList<C>)

Applies the specified function to selected columns and returns the result in a new data frame.
C# 
public DataFrame<R, C> Map(
	IList<C> columnKeys,
	Func<IVector, IVector> function,
	IList<C> newColumnKeys
)

Parameters

columnKeys  IList<C>
A list of keys of the columns to map.
function  Func<IVector, IVector>
The function to apply.
newColumnKeys  IList<C>
The list of keys of the mapped columns. If this value is null, the original column keys are used.

Return Value

DataFrame<R, C>
A new data frame whose columns are function applied to the columns with key in columnKeys and column keys specified by newColumnKeys.

Exceptions

KeyNotFoundException

One or more of the keys in columnKeys could not be found in the column index.

DataFrame<R, C>.Map(IList<C>, Func<IVector, IVector>, Func<C, C>)

Applies the specified function to selected columns and returns the result in a new data frame.
C# 
public DataFrame<R, C> Map(
	IList<C> columnKeys,
	Func<IVector, IVector> function,
	Func<C, C> keyGenerator
)

Parameters

columnKeys  IList<C>
A list of keys of the columns to map.
function  Func<IVector, IVector>
The function to apply.
keyGenerator  Func<C, C>
A function that maps old column keys to new column keys.

Return Value

DataFrame<R, C>
A new data frame whose columns are function applied to the columns with key in columnKeys and column keys specified by keyGenerator applied to each key in columnKeys.

Exceptions

KeyNotFoundException

One or more of the keys in columnKeys could not be found in the column index.

DataFrame<R, C>.Map<T>(IList<C>, Func<Vector<T>, IVector>, IList<C>)

Applies the specified function to selected columns.
C# 
public DataFrame<R, C> Map<T>(
	IList<C> columnKeys,
	Func<Vector<T>, IVector> function,
	IList<C> newColumnKeys
)

Parameters

columnKeys  IList<C>
A list of keys of the columns to map.
function  Func<Vector<T>, IVector>
The function to apply.
newColumnKeys  IList<C>
The list of keys of the mapped columns. If this value is null, the original column keys are used.

Type Parameters

T

Return Value

DataFrame<R, C>
A new data frame whose columns are function applied to the columns with key in columnKeys and column keys specified by newColumnKeys.

Exceptions

KeyNotFoundException

One or more of the keys in columnKeys could not be found in the column index.

DataFrame<R, C>.Map<T>(IList<C>, Func<Vector<T>, IVector>, Func<C, C>)

Applies the specified function to selected columns.
C# 
public DataFrame<R, C> Map<T>(
	IList<C> columnKeys,
	Func<Vector<T>, IVector> function,
	Func<C, C> keyGenerator
)

Parameters

columnKeys  IList<C>
A list of keys of the columns to map.
function  Func<Vector<T>, IVector>
The function to apply.
keyGenerator  Func<C, C>
A function that maps old column keys to new column keys.

Type Parameters

T

Return Value

DataFrame<R, C>
A new data frame whose columns are function applied to the columns with key in columnKeys and column keys specified by keyGenerator applied to each key in columnKeys.

Exceptions

KeyNotFoundException

One or more of the keys in columnKeys could not be found in the column index.

See Also