Subtitle

As explained in Data Storytelling with Altair and AI

A subtitle is a secondary heading that supplements or clarifies a title.

A subtitle is a short secondary heading that sets a chart’s context and helps clarify its call to action. In data storytelling, it turns a visual result into a more engaging story. section 5.4

Build a compelling subtitle progressively:

• Describe the situation in general, producing a broad passage of text. section 5.4.1
• Shorten the passage into a summary, then transform the summary into engaging audience-focused language. section 5.4.1
• Shorten the result again when necessary, and add keywords that appeal to the target audience. section 5.4.1

A chart about fake news

For a chart showing that fake news on LatestNews relates most to material life, followed by moral and spiritual life, a subtitle can state that context in no more than 150 characters. In Altair, set it through TitleParams() and chart properties. section 5.5.2

Figure 5.16 The steps to generate the text used for context

Follow the staged conversation used to generate context: describe, summarize, engage, and shorten. section 5.4.1

How Data Storytelling with Altair and AI covers it

How deep it goes

Develops a four-step generation and refinement procedure, then demonstrates chart implementation without deeper typography treatment.

Examples

Uses homelessness context and a fake-news chart comparing material, moral, and spiritual life.

What it assumes

Assumes a chart and intended audience, while teaching subtitle creation from a general description.

What you can do after

Apply ChatGPT and Altair to generate, refine, and place a contextual subtitle on a chart.

How it connects

Connects subtitles with data storytelling, the DIKW model, generative AI, and chart design.

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Also explained in

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  Build a Website with ChatGPTA subtitle is a secondary line of text displayed below a primary title to provide additional description or context.

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Related concepts

• ChatGPTproduced by · ChatGPT is OpenAI’s conversational AI service, which lets users interact with generative AI models and related tools through natural-language prompts.
• header elementpart of · The HTML header element represents introductory content or navigational aids for a document or section.
• contextconfigures · Context is the surrounding information, state, or circumstances that condition how an entity, event, or task is interpreted or how a system behaves.
• fine-tuningproduced by · Fine-tuning is adapting a pretrained machine-learning model by training it further on targeted data or objectives for a task, domain, or behavior.
• title elementcontrasts with · The HTML title element specifies a document’s title, which browsers and other technologies use in tabs, history, bookmarks, search results, and accessibility contexts.

This explainer was generated by Manning's knowledge graph from the text of Data Storytelling with Altair and AI. The section links point to the parts of the book it draws on.