Source code in 15 libraries — Python: Altair, Bokeh, lets-plot, Matplotlib, Plotly, plotnine, Pygal, Seaborn; R: ggplot2; Julia: Makie.jl; JavaScript: Chart.js, D3.js, Apache ECharts, Highcharts, MUI X Charts.
A grid of subplots where each cell shows the same type of plot for a different subset of data, split by one or two categorical variables. Enables systematic comparison across multiple dimensions.

Preview render from the Matplotlib implementation.