Expr.Cat (CategoricalOps)

Namespace: Polars.CSharp

Operations on Catgorical columns. Access via Expr.Cat.

Instance Methods

EndsWith

Check if string representations of values end with a substring.

public Expr EndsWith(string suffix)

Parameters

Name	Type	Description
suffix	string	Suffix substring.

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GetCategories

Get the categories stored in this data type.

public Expr GetCategories()

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LenBytes

Return the byte-length of the string representation of each value.

public Expr LenBytes()

Returns: Expression/Series of data type UInt32.

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LenChars

Return the number of characters of the string representation of each value.

public Expr LenChars()

Returns: Expression/Series of data type UInt32.

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Physical

Get the physical values of a categorical or enum data type.

public Expr Physical()

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StartsWith

Check if string representations of values start with a substring.

public Expr StartsWith(string prefix)

Parameters

Name	Type	Description
prefix	string	Prefix substring.

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To

Convert to a categorical or enum dtype. The input must be of the physical type of the categorical or enum dtype.

public Expr To(IntoDataTypeExpr dtype, bool strict = true)

Parameters

Name	Type	Description
dtype	IntoDataTypeExpr	The target categorical or enum dtype.
strict	bool	Whether to panic when encountering an illegal category.

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