Creating a model from tabular data

At a glance

Project structure

Source bundle/
└── Creating-a-Model-from-Tabular-Data.playground/
    └── Pages/
        ├── Train a Regressor and a Classifier.xcplaygroundpage/
        │   └── Contents.swift
        ├── LICENSE.xcplaygroundpage/
        │   └── Contents.swift
        └── Table of Contents.xcplaygroundpage/
            └── Contents.swift

Structure observations

• Architecturally prominent files are ranked from entry points and role-named declarations; resource-only paths are omitted.
• Primary languages: Swift.
• The verified tree contains 0 project/configuration file(s) and 0 source declaration(s).

Overall architecture

flowchart LR
    N1["Contents"]
    N2["CreateML APIs"]
    N1 --> N2

Reference code

Creating-a-Model-from-Tabular-Data.playground/Pages/Train a Regressor and a Classifier.xcplaygroundpage/Contents.swift:1 — architecture anchor

/*
See the LICENSE.txt file for this sample’s licensing information.

Abstract:
Train a machine learning model by using Core ML to import and manage tabular data.
*/

Interpretation

The arrows summarize the source-visible entry, role-named types or folders, and framework direction; when nodes come from structural folders, the sequence is a high-level interpretation rather than proof that every adjacent node calls the next. Ownership is claimed only where the next section cites a stored property or assignment. The diagram is intentionally limited to the dominant path into Create ML.

Ownership and state

classDiagram
    Contents o-- Bundle : csvFile
    Contents *-- MLDataTable : dataTable
    Contents *-- MLRegressor : regressor
    Contents *-- MLClassifier : classifier

Ownership evidence

Creating-a-Model-from-Tabular-Data.playground/Pages/Train a Regressor and a Classifier.xcplaygroundpage/Contents.swift:43 — stored dependency or nearest verified ownership anchor

let csvFile = Bundle.main.url(forResource: "MarsHabitats", withExtension: "csv")!

Composition arrows indicate a source-visible construction expression or locally owned value state; aggregation means the owner stores or receives a dependency without proving exclusive lifetime ownership.

Class and protocol design

Creating-a-Model-from-Tabular-Data.playground/Pages/LICENSE.xcplaygroundpage/Contents.swift:1 — representative type boundary

/*
See the LICENSE.txt file for this sample’s licensing information.

Abstract:
License
*/

No local protocol conformance is claimed as protocol-oriented design; external framework conformances are listed only as dependencies.

Access control

Reference code

Creating-a-Model-from-Tabular-Data.playground/Pages/Table of Contents.xcplaygroundpage/Contents.swift:1 — representative boundary

/*
See the LICENSE.txt file for this sample’s licensing information.

Abstract:
Table of Contents
*/

Swift declarations without a modifier are internal; explicit private, fileprivate, private(set), public, or open entries above are interpreted by language semantics. Objective-C/C samples instead rely on header and implementation boundaries, which are not equivalent to Swift lexical privacy.

Logic ownership and placement

Design patterns

Naming conventions

• Types: feature-specific names rather than reusable layer suffixes.
• Protocols: no local protocol declaration in the scanned source.
• Methods: no representative method name extracted from the architectural files.
• Files: feature/project roles rather than a strict one-type-per-file rule.

Architecture takeaways

• Contents is the main source-visible entry or composition anchor for this sample.
• Framework work reaches CreateML through a deliberately small high-level chain; the detailed API graph remains inside the cited implementation files.
• Stored-property evidence identifies lifecycle collaboration; it does not by itself prove exclusive object ownership.
• Access-control conclusions separate verified language visibility from the likely design rationale.
• The source does not justify labeling the design protocol-oriented.

Source map

• Official Apple documentation