You need to send three things to plotly - the x, y, and V data. For the type of plot, you could have a 'contour' or 'heatmap' - technically, you can do a surface plot also (I think this is still ...

Everyone loves graphs. When I need to make a plot with some data or a calculation, I almost always use python with matplotlib. It works quite well and produces non-ugly graphs. Most of the stuff ...