Contents

Column

A column in a data frame.

Declaration

struct Column<WrappedElement>

Overview

A column is a Collection that contains values of a specific type, including:

Each element in a column is an Optional of the column’s type. Each nil element represents a missing value.

Topics

Creating a Column

Creating a Column of the Same Type

Creating a Type-Erased Column

Creating Transformed Columns

Inspecting a Column

Transforming a Column

Adding Elements

Finding an Element Index

Removing an Element

Accessing Elements

Creating a Slice of Unique Elements

Creating a Slice by Masking Elements

Encoding a Column

Decoding a Column

Summarizing a Column

Getting Statistical Values

Describing a Column

Modifying a Column with a Value

Modifying a Column with a Collection of Values

Instance Methods

Default Implementations

See Also

Typed Columns