HTML canvasとJavaScriptは散布図(Scatter Plots)、線分図(Line Graphs)の描画に最適である。
Chart.js is an free JavaScript library for making HTML-based charts. It is one of the simplest visualization libraries for JavaScript, and comes with the following built-in chart types: Scatter Plot, Line Chart, Bar Chart, Pie Chart, Donut Chart, Bubble Chart, Area Chart, Radar Chart, and Mixed Chart.
From simple line charts to complex hierarchical tree maps, the Google Chart gallery provides a large number of ready-to-use chart types: Scatter Chart, Line Chart, Bar / Column Chart, Area Chart, Pie Chart, Donut Chart, Org Chart, and Map / Geo Chart.