Question 1

How to use Eigen matrices with Plotly++?

Accepted Answer

Include the contrib/eigen_support.hpp header and ensure Eigen is serializable via nlohmann JSON; examples show usage for 3D charts, but you must add Eigen as a dependency to your build target.

Question 2

Plotly++ vs Matplotlib for C++: which is better?

Accepted Answer

Plotly++ excels for interactive, web-based plots with type safety, while Matplotlib alternatives in C++ (like Matplotlib-cpp) are better for static, native rendering without browser dependencies. Choose based on need for interactivity and environment.

Question 3

Can Plotly++ generate plots without an internet connection?

Accepted Answer

Yes, by default it embeds Plotly.js locally in HTML files, but initial setup requires downloading the library or having it cached; offline rendering is supported but depends on browser capabilities.

Question 4

How to serve dynamic plots from a C++ web server using Plotly++?

Accepted Answer

Use Figure.json() to generate JSON payloads or Figure.html() for full HTML, then send these as HTTP responses with appropriate headers; the README provides pseudo-code for both server and client-side implementation.

Question 5

What C++ standard does Plotly++ require?

Accepted Answer

It requires C++17 or newer for features like std::span, and C++23 for std::mdspan support, as specified in the dependencies section of the README.

Question 6

Does Plotly++ support exporting to image formats like PNG?

Accepted Answer

Not directly; it generates HTML, but browsers can save plots as PNG, or you can use external tools or Plotly.js server-side rendering for automated conversions.

Question 7

How to handle large datasets with Plotly++?

Accepted Answer

It uses standard C++ containers, but performance may be limited by browser rendering; for very large data, consider downsampling or using Plotly.js optimizations, as the library passes data directly to JavaScript.

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