Fork of Contour Plot with CSV Data (Plotly.js)
A contour plot visualizes ten data points from a CSV file, mapping xi, yi, and zi values across a grid with color-coded iso-lines and labels. The example uses Plotly.js’s `newPlot` with a `contour` trace type, setting `colorscale` to Rainbow and enabling `connectgaps` to smooth regions. D3 v7 handles CSV parsing via `d3.csv`, extracting arrays for x, y, and z coordinates. Axis ranges are dynamically computed from maximum values, and the layout includes custom margins, tick labels, and a title. Data is rendered directly in the browser without additional server processing.