gnuplot and Excel, scratching the surface

Microsoft’s Excel is ubiquitous in finance. The current version (version 2105) provides the Surface chart type, with four varieties of the chart: 3-D Surface, Wireframe 3-D Surface, Contour, and Wireframe Contour. The underlying data is provided as a rectangular grid or, rather, a list of series of data. The names of the series provide the […]