majiayu000 Plotly
Plotly creates interactive (zoomable, hoverable) charts in the browser. v6.0 (2025) drops big dependencies (Pandas is optional) and improves performance.
When to Use
- Dashboards: Streamlit, Dash.
- 3D Plots: Rotating 3D scatter plots.
- Interactivity: Users need to drill down into data.
Core Concepts
Plotly Express (px)
High-level API. px.scatter(df, x="a", y="b", color="c").
Graph Objects (go)
Low-level API. go.Figure(data=[go.Scatter(...)]).
Dash
The framework for building web apps with Plotly charts.
Best Practices (2025)
Do:
- Use Plotly Express: It covers 90% of use cases.
- Use WebGL:
render_mode='webgl'for large datasets (>10k points).
Don't:
- Don't use it for static papers: Use Matplotlib for print.