I already starting doing it with godot, I'm able to draw a curve, xAxis, yAxis so that it shows the good scale dynamically etc... it's starting to use unnecessary time.
I'm drawing the curve in real time and I want my scale to adapt.
It also means that I need a Line2D for my curve, two others for my axis, several more to mark graduations. I need to write labels next to it, it's quickly becoming messy (a working plugin would be perfect, I found one but only works for godot < 2.1). Moreover how can I draw a point on godot? --> I think I just found draw_circle.
Finally, is it possible to plot with python and to display on a small panel only the result of the python plot? I'm really exploring this for the specific features such as scale etc, but if you convince me I can do what I want using godot easily, I won't need this part (I'm still curious about the answer).
In case doing it godot on godot is really the best solution because it doesn't take that much time, and if a plugin doesn't already exists, I'm thinking about writing this as a plugin.