Selector

Namespace: Polars.FSharp

A column selection strategy (e.g., all columns, or specific columns).

Constructors & Static Methods

Float

static member Float : unit -> Selector

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Operators

( &&& ) Bitwise AND

AND operator: s1 &&& s2 (Intersection)

static member op_BitwiseAnd(l: Selector, r: Selector) : Selector

Parameters

Name	Type	Description
l	Selector	-
r	Selector	-

Example

pl.cs.numeric() &&& pl.cs.matches("Val")

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( ||| ) Bitwise OR

OR operator: s1 ||| s2 (Union)

static member op_BitwiseOr(l: Selector, r: Selector) : Selector

Parameters

Name	Type	Description
l	Selector	-
r	Selector	-

Example

pl.cs.startsWith("A") ||| pl.cs.endsWith("Z")

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( ^^^ ) Exclusive OR

XOR operator: s1 ^^^ s2 (Symmetric Difference)

static member op_ExclusiveOr(l: Selector, r: Selector) : Selector

Parameters

Name	Type	Description
l	Selector	-
r	Selector	-

Example

pl.cs.numeric() ^^^ pl.cs.matches("Val")

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( ~~~ ) Bitwise NOT

NOT operator: ~selector

static member op_LogicalNot(s: Selector) : Selector

Parameters

Name	Type	Description
s	Selector	-

Example

~~~pl.cs.numeric()

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( - ) Subtraction

subtraction operator: s1 - s2 (Difference)

static member op_Subtraction(l: Selector, r: Selector) : Selector

Parameters

Name	Type	Description
l	Selector	-
r	Selector	-

NOTE

Some Polars versions support this as a shorthand for Exclude or Difference

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Instance Methods

Clone

member Clone : unit -> Selector

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Exclude

Exclude columns from a wildcard selection (col("*")).

Exclude columns matching any of the specified Selectors.

Exclude columns matching any of the specified Data Types.

member Exclude(names: seq<string>) : Selector
member Exclude(selectors: seq<Selector>) : Selector
member Exclude(dtypes: seq<DataType>) : Selector

Parameters

Name	Type	Description
names	seq<string>	-
selectors	seq<Selector>	-
dtypes	seq<DataType>	-

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ToExpr

Convert the Selector to an Expression. Selectors are essentially dynamic Expressions that expand to column names.

member ToExpr : unit -> Expr

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